10.5 user here. I think it's a terrible OS put into the coolest computer I've ever used.
There's something about the brilliant screen and absurdly good speakers that just feels fantastic, but the entire product doesn't make an ounce of sense to me.
Other than the iPad Mini, I can't keep this in my pocket, so I can only take it with me when I have my backpack. In which case, I can just as well take my Thinkpad, which can do more and can do it more quickly.
The screen is kind of wasted as well. Yeah, the aspect ratio is great for web-browsing, but again, I can be much more productive on a full computer. And if I want to watch videos in bed or in other hands-free situations, a laptop makes more sense simply because it can stand properly on a not flat surface.
I could also never take this with me as my only device because I can't code on it, but it also can't replace my iPhone because it doesn't have Signal or Whatsapp.
Honestly, right now the only thing I is use this as a second screen and music playback device when I'm traveling and my ****** Thinkpad speakers don't cut it. But that's such a limited use case.
I just can't think of a situation where I'd rather have the iPad than a laptop, honestly.