It’s likely these employees’ initial employment agreement was to work on-site in the Bay Area office. If they want to move away from the Bay Area and work 100%

It’s likely these employees’ initial employment agreement was to work on-site in the Bay Area office. If they want to move away from the Bay Area and work 100% remote, they’re being offered that option - that’s a change in the contract itself, in their favor, which they don’t have to take if they don’t want to.