The genie is out of the bottle. The trend of working from home from that started before the pandemic has only accelerated. It makes no sense for an information worker to sit in a chair in an office. For one thing, the company has to buy the real estate to put the chair and then buy the chair. They need to buy the chair at the dining facility and hire workers to man the dining area. Of course, the worker has to get ready and drive both ways to work, about 25% of the work effort. Some companies will downsize to save money on facilities. Most, not all workers will want to work from home, putting the remote employer at a competitive advantage.
I saw Tim Cook's 3:2 rule. The round trip to Cupertino is brutal. Expect managers to exercise their discretion and not strictly enforce the rule. Tim is giving managers the alternative to have people in the office if needed.