At least you’re open to moving on. I think keeping an open attitude in any scenario is prob the best option. For most people, I’d recommend they keep using whatever works for them. If you’re happy with Proton then switching may just cause frustration. However, if you’re very much security focused and also care about things like being able to access your calendars/contacts in the apps you want, then I’d prob suggest just using SimpleLogin for email with their GPG feature, vaultwarden for passwords (you can still use the BitWarden phone apps), and Nextcloud for Calendar/Contacts which also supports DAVx for mobile.
At least you’re open to moving on. I think keeping an open attitude in any scenario is prob the best option. For most people, I’d recommend they keep using whatever works for them. If you’re happy with Proton then switching may just cause frustration. However, if you’re very much security focused and also care about things like being able to access your calendars/contacts in the apps you want, then I’d prob suggest just using SimpleLogin for email with their GPG feature, vaultwarden for passwords (you can still use the BitWarden phone apps), and Nextcloud for Calendar/Contacts which also supports DAVx for mobile.