I'm with Cowbee. I don't see this happening outside of a few mom and pop places that decide to do it on their own until "government" forces the change. Just look at the 3 letter jackasses freaking out about WFH.
I was looking for fully remote jobs recently. All the local jobs are back to 3 days in office. One of the recruiters said something like "our employees are happy to go into the office three days a week" and my eyes nearly rolled out of my skull.