Re: Wrong site?
You're assuming a conflict which doesn't necessarily (I would say, usually) exist, between the wishes of employer and employee on this topic. WFH means not having to maintain a large office in an expensive city centre, instead you can just rent flexible, serviced office space (from Regus, or someone else). One major financial services organisation that I'm still close to (but no longer work for) has already closed two large City offices on exactly this basis.
To be clear: some jobs can't be done from home (e.g. plumber, or hardware-related IT roles, if you prefer), some people won't want to work from home even though they could, because they miss the human contact (although they could easily work from their nearest coffee shop, rather than pay thousands to spend several hours a day with their noses pressed into somebody else's armpit), and almost everyone will need to meet in a central location from time to time (one or two days a month, perhaps).
The net result is going to be a lot fewer commuters. I've seen documents from train operating companies that project passenger numbers eventually getting back to 80% of 2019 levels. I think that's a significant over-estimate.