I have been on a MacBook Pro exclusively for the past 3 years and I do not ever see anything about iCloud. I also never signed up so may be that is why?
My iCloud is full. Every once in a while my iPhone nags me to upgrade for a few days in a row and I tell it no and it goes away for 6 months or so. My Mac has never once nagged me about iCloud storage.
Comparing windows to an OS I don’t use isn’t a fair comparison unless my work machine stops being windows. I assume Apple are a slightly less variant of bad though