[necovek]

That's easily solved: make that either be "interruptible" or an indicator if you are in "deep focus" or not.

However, one does not always plan in advance to get into deep focus, so I don't really believe this problem is solveable in a useful way. Basically, we need to learn to regain focus quickly and push people away when busy.

Also, async interrupt methods are great when used properly: don't you hate it when someone pings you with "hi" or "hi, I have a question" or similar and waits for your response? Good practice is to ask a full question which allows the other side to respond when they can without interrupting.