> If they're not offering a pretty major cost of living adjustment to salaries (probably in the realm of doubling salaries), this is going to really suck for those who were previously remote.

Literally no salary adjustment will make it better for many people. Your spouse has a geo-tied job? Your kids love their school (or, hell you just don't want to raise kids there full stop)? Oh, and what salary adjustment will make up for it if you live in the kind of place you can afford a half-acre back yard?