I believe there's still a mental separation you get from having separate physical spaces for work life and personal life.
E.g. there are times that I do break the rule (very rarely) and get on my work computer (e.g. download work documents for tax prep), and part of me feels like I'm back at work.
If you've not tried it before, it may be hard to relate or recognize the difference.
I don't know about everyone else, but once I close all my work apps, I completely forget about work. I just got other things I wanna do on my mind so I don't see why I would think about work.
Work to me is like going to the bathroom. I go, do my business, then leave and it's back to my normal day. With WFH, that's even more the case.
E.g. there are times that I do break the rule (very rarely) and get on my work computer (e.g. download work documents for tax prep), and part of me feels like I'm back at work.
If you've not tried it before, it may be hard to relate or recognize the difference.