This article finally prompted me to do what I should've done a long time ago, which is to create a Fastmail account and begin importing my Gmail into it. I've seen this story far too many times, and no longer will I say "yeah but it'll never happen to me". Setting up the import was insanely easy, and my Fastmail account is now configured to enable me to send using my Gmail address from directly within Fastmail. Plus…
But even then you have to trust FastMail not to lock you out. Sure it's a paid service so less likely and I'm sure their customer service is better. But it doesn't fix the root issue of being dependent on one party.
The root issue is Google. This doesn't happen with most companies. This is specific to Google's culture, which treats customers as statistics. That comes out of how Google thought about search and ads, and doesn't work for anything else.
The secondary issue is being dependent on one party.