Exactly. I've been using Fastmail for eleven years, and the records I had set up had been deemed sufficient for that long. They still are, for everyone else. Google just decided all on their own, without even any announcement (which I'm pretty sure I would have seen here and elsewhere), to start being extra-picky about something they had previously been fine with. It comes across as an excuse, not a sincere attempt to improve anyone's security or UX.
