I have used/owned old HP Tablet PCs that ran Windows XP Tablet PC Edition, and one of the bigger Surfaces. The HP with XP was a better experience. Windows 10 on the surface closes the on-screen keyboard after every change of focus from one input field to another. It doesn't open the keyboard automatically. And the Surface's battery swelled up and popped the case open.

I'd actually like a modern pen-enabled PC, but they seem to be getting worse at software (and batteries!) over time. And when I'm at a desk with a keyboard, mouse, and large monitor, nothing else from MS beats the classic 2K/XP (7's okay too) UI.