Yeah, it was one of those things I noticed when I first started using Linux and wondered why every other OS didn't just copy it.

Probably just simple resistance to use of modifier keys in non-technical users, at least on the Windows side. A lot of users never touch a modifier except for Ctrl for copy/paste and maybe Windows for start menu search.

On the Mac side where key combos and modifier use is more widespread among users, it’s probably because there’s no intuitive visual that can be associated with the interaction.

It's not like Apple would frown about the idea of an action having "no intuitive visual associated with it". On iOS, you can scroll to the top by pressing on the status bar as one example.

Unless your status bar is on the bottom. Then scrolling up is really hit or miss

Oh, I get having a visual way of doing it with just a mouse for sure. But for power users or even just-a-little-bit-of-knowledge users it's super quick and convenient. When I had to use Windows for work it drove me nuts that the option wasn't there (ended up finding AltDrag thankfully).

On Windows, I use AltDrag.

Altdrag doesn't work with scaling and is missing some other nice to haves, The Altsnap fork of it fixes this. Its one of the first things i install.

windows does support [win] + [arrow key] though

Mac supports the win (Cmd) + arrow key thing too; figured I'd mention since the story is about macOS window management.