That's why I uses Ditto Clipboard Manager in Windows. I have it set to use paste without formatting (paste in plain text) as default.

I recalled Windows can do it by using Ctrl+Shift+V which paste without formatting. Just a extra key to make it happen.

Yes, I keep Notepad open just to bounce copy/paste off of to strip formatting.

Yeah this is not a Mac-only thing.

Yup, and whether paste without formatting is ctrl-shift-v, ctrl-alt-v, or not available varies app by app. It's infuriating.