IVPN never worked for me while I was in China (Android, it just kept loading infinitely), while Mullvad did (Proton VPN almost never worked). Keep in mind this was before they introduce Shadowsocks.
You seem to have a black and white view of censorship. QUIC over HTTP obfuscation will help many people bypass light-to-medium censorship while keeping connection reliability. I never said it could bypass advanced censorship systems , despite you apparently interpreting it that way.
And again, I repeat that the GFW doesn’t, at least not universally, block all Mullvad VPN IPs.
