I upgraded to 10 last night and rolled back to 8.1 about an hour ago.
I'm not a tech person. I don't know much about these things. I just know that I didn't like it.
I found it boxy, the icons were too small and nothing I did made them larger (the ones in the task bar along the bottom). It was hard on my eyes. I also had a very hard time figuring out where things were. That search bar was awful on my laptop. It was slow, it would lag, and it didn't help me find things.
We also had internet issues with it. Every time I opened even E, our internet slowed to a crawl. Heaven help if I tried to open anything like Facebook with a bunch of images and junk on it. Hubby's games wouldn't run (they opened and worked, but they lagged something awful). We use Hulu and Netflix. Sometimes one person will be watching a show or movie, but someone else is using their laptop. We weren't able to do that. But if one of us stopped, the other device started working slightly better.
I don't like 8 much better, but at least I've managed to make it work. I'll update to 10 again when I have no choice but to do it. Just like every other OS change. I'll do it when they give me no other option. Maybe I'm just nitpicky, but I don't game and I don't do a lot on my laptop. I write in notepad and use the inernet to come on E, Facebook, Youtube, check email, and Fetlife. I would probably be fine if things never changed from Windows 95 back in the day.