Why exactly?
Sadly, there’s not enough budget for now to hire in-house IT and constant supervision. Although maybe a solution like Proton + LO will be easier and more similar priced to Microsoft, except for the possible Excel problems, lack of something similar to Exchange and Teams (collab can be done via Proton Docs). But, lacks some things and control over employees activity with clients as @redoomed1 @Tech-Trooper or @ph00lt0 pointed as well on Paid Microsoft or Google?
Your company workflow is awesome, congratulations!
I heard it’s still not enough to replace Adobe, unless it’s basic stuff.