Do I go with a @gmail.com or other corporate address? Then I risk losing my email if my account is suspended.
Do I go with a domain I own? Then I risk losing it if something like this happens.
Either way is serious because email is effectively a master key into all my accounts.
I'm honestly not sure what's best.
This one, it’s this one.
Losing your domain tends to require human action: from someone forgot to pay the renewal to someone messed up and sinkholed it because they thought it was a C2 server.
But because humans are in the system there tend to be layers of processes that try to prevent you from getting to this state and can get your world back to normal if you do.
Gmail offers nothing like this. When the ML algorithms decide you are too many sigma in the “abnormal” category, you are done. And there is no one to talk to who can fix your problem.
If it ever becomes a problem I flip my MX record elsewhere.
Maintaining a domain you control, with a couple of privacy-aware (Protonmail, Fastmail) fallback / out-of-band email contacts, and possibly a few online presences (Twitter, Mastodon, Reddit, etc.) which you can use for signalling, helps.
Knowing actual postal or phone contact information for key partners is also useful. You can use these to communicate in an emergency as well, and spread word.
Operating as a pseudonymous nym online for a decade and experiencing several lockouts / shutdowns over the period ... has been interesting.
I think that's because I was coming at this from the perspective of trying to prevent getting hacked, but really I'm less worried about that than I am about losing access.