I totally agree. Where I work, in-person work became optional. Strangely, everyone 35 or younger decided to work from home (most of them don't have kids, which would be the one decent excuse), but the older people mostly come in. At 34, I'm sort of in-between, but enjoyed bantering with people my age or younger.

So I get the worst of both worlds: my boss can still come in my office at any random time and bug me about whatever, but not the social life or the ability to bounce ideas off each other when designing a new system. All-online communication simply does not work for creative or complex tasks.

The youngsters get practically nothing done -- I worked with them for several years before the pandemic, so I know for a fact that their productivity specifically went down 90% -- and guess who gets to pick up the slack? It turns out that even relatively motivated PhD students actually need in-person accountability and direction, or they just spin their wheels at best, or goof off at worst. No matter what excuses they make, it's not good for them in the long run, since it will be reflected in their CV. I'm not against fun, even during work hours, but you have to get the job done.

It's a medical research institution with a small clinic, so there are, as you suggest, additional issues there. I think science, in particular, requires in-depth, in-person conversations and that is where most of the really good ideas come from.