I'm currently on a half empty commuter train and have just finished the worst task I can think of for the week (time sheets) and now I'll continue working on something else.
But if I was at home I'd probably have accomplished nothing yet, and even if I tried to do something, I'd expect to be repeatedly interrupted for the next 1.5h, by people that I love and can't turn away.
My brain is funny that way. Just the expectation that I might get interrupted prevents it from even starting on anything.
Edit: this is for me. I personally encouraged someone else to use the opportunity to work from somewhere else so they could be with their child last week.
I love that remote work is now both technologically possible and socially acceptable.