I’ve been using Proton mail for almost a year now. For the most part, it has been great. I’ve thrown myself into the Proton ecosystem, using Pass, Calendar, and of course, Email. I also had tentative plans to move my VPN needs to Proton instead of re-upping Mullvad in the fall. On one hand, the ecosystem is fantastic. It all works well together, and does almost all the things I want it to do.
Hm, I personally prefer that tbh. I hate missing stuff in my old gmx mailbox because it suddenly decided everything is spam. But I get very little of it.