Yep this. I migrated from Gmail to my own domain years ago. It was painful. Weirdly enough, I think the longest holdouts were my parents, who were still sending email to my Gmail account a decade after I stopped using the address.

I moved my email to Fastmail, and I’ve been very happy ever since. But now that I own the domain, moving to a different provider - if I ever need to - would be trivial.

I moved to Fastmail, set it up with Gmail so I received forwarded emails. Years later there’s still a long tail of senders using my Gmail, but I get the emails forwarded, and only actually log in to Gmail every six months or so.