@[email protected] I went with Proton and the reason was either that I could import and use my own PGP key, or because it had more general compatibility with other mail services using PGP (well possibly both those reasons). So I could send encrypted mails to Thunderbird users as well as GMail users (who had a PGP encryption extension).
@[email protected] don’t forget the CL:OUD Act either - that has serious privacy implications for countries outside the USA