Everything works as long as you stay in the apple ecosystem. I had this weird problem where my wife's macbook was backing up all the photos and videos from google photos to icloud. I know nothing about macs, I got a mbp over a decade ago and put linux on it as soon as I figured out how. I found it quite harrowing figuring out how to remove all that from icloud, and prevent it from happening again. It still gives very odd errors seemingly related to what was probably an incorrect fix.

Or scanning or printing or audio or wifi or just the window system itself