If it’s the sending and receiving part of email, I’ve switched to purelymail (you could pick another) and put it behind my custom domain name. Because behind a custom domain, that’s the last time you’ll have to update your contacts as it won’t be dependent on which email provider you choose.

Searching through decades of old emails I do still use the Gmail account, but I just have to get off my butt to self host a local IMAP server for that.