I love the experience on Fastmail personally, but you have checked all the boxes to protect yourself if A. You have recent Takeouts or sync of your inbox and B. People know to reach you via the address on your own domain, which you can repoint to a new service if necessary.
If you're doing these two things, you're effectively protected from this issue, even if you use Gmail. Of course, it won't necessarily help you with losses from other Google services you might be cut out of. For an Android user, for instance, there's no real way around potentially losing every app you've ever bought on Google Play.
If you're doing these two things, you're effectively protected from this issue, even if you use Gmail. Of course, it won't necessarily help you with losses from other Google services you might be cut out of. For an Android user, for instance, there's no real way around potentially losing every app you've ever bought on Google Play.