I miss speaking with people about work in the easy way of leaning over and asking a question (hey, do you remember the name of that function to does ___?) etc. Sure I can ask on slack but it's not the same.

I mis-conversations being unscheduled

And I miss socialize "with coworkers". We're working on the same project. That socializing helps know what's going one, what each other is doing, what problems we are running into. It gives up empathy for each other tasks etc. Reading about it in various forms of online databases doesn't come close.

I had structured my life so that I could walk to work every day, so the short commute was actually some very welcome exercise.

I miss having lunch with coworkers the most. There's some natural bonding and trust building that happened over lunch, talking about random things, both work and not work related. This is very hard and possibly impossible to replicate with remote work.

With remote work, meetings are scheduled for a reason. Meeting just to "hang out" feels weird. Multi-user meetings with more than a few people also feel off because everyone is interrupting each other, you can't have multiple threads of conversation. Talking on slack, you usually can't tell how the person is feeling. The tone is lost. I've found communication is generally much poorer.