Bloody hell, no! I hope WFH does not become the norm! Ironically, I was the one who WFH (teaching violin/strings) before all this started. Then I had to work out how to do it online.
Meanwhile, DH and my 3 adult sons were forced to WFH as well - but we have no spare rooms, no studies. People WFH sitting on their beds isn't ideal - back pain has ramped up. Downstairs we only have a lounge/open-plan kitchen (where I usually teach when everyone else is out at work!).
So no, WFH isn't just about children under the age of 8, OP. Children who are over the age of 20 are also a problem when they still live at home, let alone husbands!
And our town centre will die without people going back to work in offices. OP, it may not concern you, but what about all the little local independent coffee shops, sandwich shops (I don't mean Costa!) and clothes shops who have always relied on foot-fall during the week?
I'm guessing that in a year's time, the whole WFH thing will be much less popular. I can't cope if people stay at my home when actually it's MY working space, and not theirs, and we have no room for them.
Bully for you, OP, is what I'm feeing right now. I do think you're only thinking about what suits you, and not seeing things from the perspective of people who aren't like you. 