Currently working on that too. I mainly grieve over their mail and password management services. Bitwarden would be a solid ProtonPass replacement but I‘m considering hosting Vaultwarden on my tailnet for more independence from cloud storage.

E2E encrypted mail is very annoying because no one else seems to offer a bridge like proton so I‘m considering using a classic provider with a privacy commitment and just archiving locally to keep the bulk of my mails to myself. Mailbox, Tuta and others do offer similar mail experiences though.