Re: Separate environments
I work in IT.
Sounds similar to some of the issues I encountered when all of this began. My SO's view was "If you're at home you're available for home stuff".
We agreed that when I'm at my desk or obviously engaged in work stuff during normal hours then I should be thought of as "In the office", eg contact me if there is a fire, pipe has burst etc. After each of our finish for the day we go out for our daily exercise as "commuting time". It's not until after the commuting time are we into the "home" stuff. It's made both of us happier.
In terms of the office side of things that was primarily my co-workers saying that they didn't understand or needed help with something else. It was generally easier for them to ask me than to think about the problem and work it out for themselves. Being in the office it would have been quite rude to ignore the person or to tell them to go away and think about it a little first. Being at the end of slack has meant those sorts of questions can stand a 20-30 min delay in responding and most of the time I received "I've figured it out now".
A year on I'm able to deliver more of the stuff I'm required to deliver and the interruptions I receive show that my peers have through about the problem and it's at the point where a second pair of eyes would really help. The "We need to male a decision on X" is always going to be there, so there's still plenty of adhoc meetings / comms
Would I go back to the office, only when forced, about the only thing that I find harder in the WFH is the lack of whiteboard for adhoc diagrams, but that is a good thing because those diagrams are produced and in known locations rather than in someone's head.