A greater percentage than that leave every year anyway, so it doesn't sound all that dire. (I'd love for it to be that dire as we've gone remote-first with pretty good support for that, but I don't think it's actually going to be as massive a tailwind for us as this and similar articles suggest.)
IME 10% turnover is basically background noise of the unavoidable "my spouse got a better job and its right next to the kid's college" sort. That's practically a near-unicorn-level employer with lots of money and negligible amount of dysfunction.
It’s really not. Normal attrition rate is probably more than that and a good portion of the people leaving over wfh policies probably would have left for other reasons anyway. So the added resignations over wfh aren’t a huge burden yet. It will become a big problem if hiring continues to be very difficult, but we won’t know if that trend holds for some time.