A couple of thoughts, 1. My company has been building new buildings that would add 3,000,000+ square feet of office space to the campus this year. I think they will probably nix working from home when this is all over just so they don't look dumb for building all that new office space.

2. My company has been leaning heavily into not just open office space, but what they call freestyle office space. They only allocate enough desk space for 50-75% of the people working in the building with the assumption that people will be in meetings or elsewhere for enough of the day to make it work out. You do not have an assigned desk and are not allowed to sit at a certain desk for more than 2 hours. (Yes, many/most of us think this is the height of stupidity - it's like being back in college and everyone is working in the library and you have to have a backpack to carry all your stuff from place to place). Of course, this whole seating arrangement is a nightmare in a social distancing situation. What they are saying now is that when we go back you can sit at a desk the whole day, but every other desk must be empty. So, intead of having enough desks for 50-75% of people, there will only be enough for 25-37.5% of people. Clearly they are going to have to allow working from home to continue for a certain percentage of people. I'm honestly not sure how they is all going to shake out.