Fanless x86 desktops are a thing too, in the form of thin clients and small PCs intended for business use. I have a few HP T630s I use as servers (I have used them as desktop PCs too, but my tab-hoarding habit makes them throttle a bit too much for my use - they'd be fine for a lot of people).
My experience with fanless Intel is that they tend to be rather sluggish for desktop GUI use, though. Which doesn't seem to be an issue with Macbook Air.
I've been experimenting with Asahi Linux recently on a spare M2 Air I have lying around, honestly very impressed. It's come on a lot since I last tried it a year or so ago
Fanless x86 desktops are a thing too, in the form of thin clients and small PCs intended for business use. I have a few HP T630s I use as servers (I have used them as desktop PCs too, but my tab-hoarding habit makes them throttle a bit too much for my use - they'd be fine for a lot of people).