If you don’t care about Windows software, Chromebooks are popular and cheap. They don’t have much in the way of security issues, don’t need much management, and store your setup in the cloud.
If you care about the software you probably don’t want ARM. The translation layer is supposed to be quite noticeable unlike Rosetta 1 & 2 on Macs.
And PCs no longer start at $750 so ARM can’t undercut by much. I’ve seen sub-$200 PC laptops. Sure they’re garbage but PCs are at basically every price point now.
Apple had it easy. “Our processors are way better than our old ones, we’re doing this, enjoy or leave.”
MS doesn’t have the kind of position to force this. So why would the market move?