@trr, CTC already works 3 days in office, 2 remote. Not sure what's different in your idea? Though I'd be pleased as punch to have an extra day to get work done at home instead of dealing with a commute, people chatting socially in the hall next to my desk, and meetings that could-and would, if we were still remote- have been emails.
I'm just not seeing much uplift in technical discussions- we're all crowded around a single screen or projector image now instead of our own individual ones. I guess sketches are harder/less precise, but tbh I think we rely overmuch on the precision of back of the napkin sketches anyway.