> Where is the demand for it?

There was at least one person who said[0]:

"I'd absolutely love to have one, if it just ran Linux.. [...] I've been waiting for an ARM laptop that can run Linux for a long time. The new Air would be almost perfect, except for the OS."

Seems like the same person has even used Asahi to make a Linux kernel release[1][2].

But Linux presumably doesn't have the resources to go chasing hardware platform support based on the whims of a singular Linux kernel developer/maintainer/creator.

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[0] https://www.realworldtech.com/forum/?threadid=196533&curpost...

[1] https://lore.kernel.org/lkml/CAHk-=wgrz5BBk=rCz7W28Fj_o02s0X...

[2] via: https://arstechnica.com/gadgets/2022/08/linus-torvalds-uses-...