I have [0], and it's actually not quite as bad as you would expect. It certainly wasn't fast, but I had no problem using it for basic web browsing and document editing. The painfully slow hard drive and processor speeds on that computer actually caused more issues than the lack of RAM.
My experience with Win10 on that laptop actually led me to buy a dumb gamer laptop for college. As those all do, it died prematurely, so I ended up back on the T410s for a while. I put KDE Neon on it. It was great!
If you're saying that you can install and use Win10 on a laptop with 1 GB of RAM, well yes I acknowledge that is true. But it's a purely academic exercise, it's not actually a usable computer for the overwhelming majority of people.
Maybe it would have been fine for my grandma. She was using a Pentium II running Windows XP to go on Facebook in the early 2010s.