My company did the same. We had a six week assessment period where everyone was required to come in two days per week. Once that data showed no major difference in output, we got a smaller office (for receiving and such) and everyone was told the office is optional. Smart business that kept people happy.

This right here.

Find me a company deeply invested in office real estate (in particular, expecting a return on that real estate), and I'll show you a company against remote work.

The real detriments don't exist. True, I have met workers that don't like remote work: companies have latched on to those people as an excuse to continue what is otherwise an entirely transparent narrative.

If anything I gain productivity by working from home. I see companies that don't support that kind of work as entirely being behind the curve.

Mine was a bit hesitant but they are now talking seriously about getting rid of more offices and they had done one pass on that before. I would sorta like them to have an office subscription