Our office is open now but staff have been given the choice. I still do a couple of days a week normally a Monday and Tuesday.
A hybrid approach like this I think would work best.
WFH benefits:
+ No commute and all associated benefits
+ No eating out as much/at all
+ Lots of personal space
+ Minimized office distractions (chit chat, etc)
+ Optimized work setup (monitor, keyboard, etc)
WFH drawbacks:
- Lots more meetings on the schedule
- Lots more emails in your inbox
- Potential communication issues (laggy comm, people "stepping on each other" when trying to speak, people's pets/kids/etc making noise in the background, etc)
- Reduced efficiency from not being able to quickly and easily demonstrate concepts, especially those that involve diagrams/pictures/etc
- Reduced camaraderie and team "bond" from not seeing your colleagues in person
So, it's a balance. Again those benefits/drawbacks are from my anecdotal observations, I'm not a sociologist and haven't done any scientific studies or polls on this