They exist, they’re just more corporate and centralized, and inundated with basic tech support questions due to the huge install base.

Like this: https://techcommunity.microsoft.com/category/windows

If you dig deep enough in there you’ll find administrators talking about powershell hacks and devops and group policy and stuff like that. There’s probably people who are “passionate” about Windows, I’d imagine, but since it’s closed source there’s only so much you can do without being literally an employee of MS. The people I’ve met like this are kind of smugly defensive about Windows because they’ve invested so much training and knowledge into its arcana, but it’s not exactly “passion”.

It reads exactly like the kind of work that goes into growing plant crops, which is good. It’s the sort of study that needs to be done if something is going to be considered for a possible major food source.