I lead a team of over 20 software engineers plus another team in a low cost country. Remote work is pretty important because not everyone we work with is local. So in 2020, it took us a bit to adjust, but we mainly had setup things to work remotely anyway, so it wasn't that big of a deal. We did notice that project teams worked great... but the team bonds across projects was weak. People simply didn't get to meet and work with those people. I just don't wan to see the "old school if I don't see you, you must not be working hard" thinking to return.
Yes, there will always be people slacking off. That goes the same in the office too... But working from home has made people on my team happier. It gives them better home and work life balance. It gives them better flexibility to deal with kids, spouse, auto, whatever life throws at you issues. I'll have people log in late at night or on weekends...just because they had something pop in their heads.
Yes, my company suddenly feels the need to heavy-hand it and push people back on the office... despite most teams working well this way.
It does take a unique job to be fully remote (I do have a few employees that work this way) and it is even riskier to hire someone right away as fully remote. But having hybrid workers should be a "norm" for most office workers. Let us gain something good from 2020!