As I live in NYC, this completely blew my mind and I still felt that anxiety and awkwardness just leaving my stuff to go use the restroom. Near guaranteed theft in NYC lol.
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And to add another story. A friend and I were traveling in Japan a few years ago. My friend had the lucky privilege of forgetting his backpack (with laptop, passport, all the not-fun-stuff to lose items) not once, but twice during the trip.
The first time, he forgot it on the train ride to Osaka (left it on the rack above the seats). The bag went all the way to the end of the line. 4 hour round trip to get it back, but we were super surprised.
Second time was the day we were to fly back. He left it on the train platform bench (!!!) for that non-stop ride to Narita. That feeling of dread when we started moving and he realized he had to wait at least an hour before he could contact anybody about it.
Long story short, he took the 1 hour train back and it was still sitting there. Missed the flight, but got everything back safely. Amazing.