I switched over to Proton from Gmail about 8-10 months ago and it’s been great so far. Folders and filters have been like what I was used to. The only thing I haven’t played around with much is calendar and invites.
I ended up going for the whole proton bundle since it included the vpn, storage, and custom domains (up to 10 addresses I think)
I tried to get it to straighten the hair out a bit but that’s as good as I could get it. Uncanny resemblance.