I, personally, do not use Proton enough to justify paying for it.
And it’s perfect because I don’t need to provide any banking details.
If you’re satisfied with the same workflow as me (free Proton Mail + paid alias service), then sure you could cancel your paid subscription and make the switch. 
Alias, alias, alias. Especially for throwaway situations like job applications. Tbh, that’s the one that made me think more seriously about aliases in the first place because of the sheer amount of broadcasting my email in every direction to non-caring startups etc. 
Plenty of similar questions on that topic on this forum.
TLDR is:
- either go all into 1 company and be screwed if they become evil
- compartmentalize and split the services but spread your trust
I chose 2., mostly because I do not consider Proton good enough for each aspect hence I’d rather hand-pick the best service for the job.
And that comes with Addy > SimpleLogin, Addy is just objectively miles ahead in terms of UX/usability.
Same, Proton Drive I do not care that much because I’d rather have my own NAS.
Proton Calendar doesn’t work perfectly enough (yet it’s close), hence another FOSS tool instead.
Proton VPN is too much KYC for the paid benefits, other recommended ones are individually better. Also I do not care about switching countries because I do not pay for Netflix.
Proton Pass is totally useless when having a local Keepass database.
Proton Authenticator, I’d rather use the one baked into my Yubikey or Ente Auth.
Proton Docs/Sheets/Meet are either targeted towards businesses or not needed to me (I use local LibreOffice suite if needed).
As you can see, I mostly want the critical part (emails) to work at all times, hence why I do use a service.
The rest I do not really use/care, so I am fine not embracing the entire ecosystem.
I tried, it is just not good enough hence I’m fine self-hosting some of the stuff to have it more private + better features-wise.
The idea in case 2. is meanwhile to not have accounts at 15 different services either, so go carefully and consider the risks for each company you’re adding to the mix (if using their cloud service).
Again, this is for me.
Consider your own use case, needs/skills and if this also applies to you or not at all.
Political sidequest
I do not like politics. Hence I try to reduce them as much as realistically possible.
I also don’t like ecosystems with walled gardens. Proton even if better than Google/Apple is still one.
Hence I’d rather opt out from that and use standard protocols even if it means that I need to DIY some of the solutions. LLMs are here to help hopefully so yeah! 
Moreover, I’d rather support individuals than a big company.
One argument against is the fact that he might maybe go under sooner?
One argument for is the fact that the service is great, it’s focused on one single thing done right and I also like to support small individuals rather than big political companies.
It’s kinda buying your bread from a nice hand-crafty local artisan vs your big corpo grocery store kind of a situation. 
Those 2 are very unrelated if being honest.
You can be Jezz Bezos/broke student and send an email to any email server. It being Gmail, Yahoo or even Hotmail.
Email is a standard protocol, you don’t need to be a big tech to receive/send some.
You mostly just need a good reputation to make it work, hence server admins needs to handle DKIM/etc and have a good track record of not being banned/marked as spam by their users.
Never had a single issue with Addy’s servers, their email reputation is very much well set and works flawlessly.
To your school, an ****@addy.to or ****@gmail.com will be the same because the email is again: a standard protocol. It’s not only Gmail ↔ Gmail compatible. Hopefully, imagine otherwise! 
I never used Classroom so I don’t know for that one but moving away from Google Drive is not a bad thing. Plenty of online solutions exist that are more privacy respectful.
Also, you can always open some of those for read purposes without a Google account if set with the right view permissions.
TDLR: doesn’t justify being on Google for such minor things.
Small organizations do not care and use Google services you mean?
Yeah because they don’t know better and are not tech-savvy.
Your personal usage of tech doesn’t need to be tied to a public establishment tho.
John Doe is using Gmail and all Big Tech, doesn’t mean you need to follow the crowd and do the same if you have good reasons (like privacy, sovereignty, not needing to pay for Gdrive once you’re past your free tier etc).
Don’t be like John Doe and opt out from the mainstream defaults. 
You do everything on your phone, no laptop/desktop for real work?
Google knows your accounts so what? We just give up and continue to give everything from now on?
Or do we slowly opt out to achieve some proper de-googling?
Why are you here if not to extract yourself from Big Tech’s claws?
Just skip aliasing, Proton, Graphene and stick to Google, it’s simpler and works. 
Bear the consequences of it then tho.
Defaults are always simpler, cheaper and just work out of the box.
You wouldn’t have companies around those products otherwise and everybody would be self-hosting their FOSS tools.
Not sure that there aren’t ways to fix those “problems” with some healthy and basic solutions.
I did quite some volunteering too, yet I never put the organization ahead of myself. I do come first and will not compromise my own security/privacy in favor of free labor.
Wait, did I read that maybe the 2 biggest ads-fueled Big Tech companies could do their job poorly and make a cross on your personal data? You really think that’s a thing? 
It’s like saying
Man, I really hope that this professional renowned jewelry thief looking at me across the street from his hotel room with binoculars will not rob my small yet rich store full of diamonds during NYE’s messy situation. 
Please reconsider your take. 
Not sure if the Reddit post is about SimpleLogin going down or something else?
I do care about privacy more than ease of use. If Addy goes down, I’ll migrate all my emails.
I do take that balance over convenience.
I also love how people do only consider their aliasing service going down and not email server. Like, both can go down/become evil you know.
Hence what, self-host both? Argument is kinda fragile.
No software is eternal, accept that and make your choices based on convenience/security/privacy with a Venn diagram to see where you land.
I chose the friction-ful path, but I do get both the best worlds of privacy + security.