So right now I have Windows 8.1 (came with my high-end laptop...no choice), that runs Morrowind perfectly. However, I keep getting prompts for my "free" upgrade to Windows 10. Apart from the rumors I've heard about Windows 10 being heavily "monetized," I'm also concerned that it might affect my ability to run and/or mod Morrowind.

Does anyone here run and/or mod Morrowind off Windows 10? If so, is the experience better or worse? Should I upgrade? Thanks!

No problems for me. Didn't even have to configure anything. Works right away. Better than on Windows 7 actually, because I always had to run it in compatibility mode.