When you are locked in to a 3/5/10 year lease for the space, that's not actually an option. Most leases signed pre covid should be up by now but clueless management probably renewed anyways.
And the really big corporations own their buildings. You think the company locked into leases are mad? The companies who own the building are pissed! Some have a multi million dollar building that's losing value faster than the speed of light.
They can't depreciate the assets and use them as a deduction if it doesn't count as an office expense. That only qualifies if a threshhold minimum number of workers spend a threshhold minimum amount of time in the office.