ARM in the cloud and ARM on the desk-top (aka, SBC and Laptops) are nearly entirely different ballgames - certainly from a user UX perspective. Basic boot support, standards around device tree, actual driver support, firmware, quirks, ecosystem challenges due to vendors and the nightmare of a gazillion kernel forks.

I was actually shocked to see that Snapdragon 8 Gen 1 already has upstream support, but AFAICT that's not a tablet/laptop chipset. And the one that is again seems to only be seeing Windows support. The other mobile chipsets with decent suppor are few and usefuls even fewer - maybe three and that's including Librem/Pinephone.

Maybe you can find me an example of the 7c/8c running, anywhere? There are at least some DTSI for some 7c boards, but again, absolutely zero consumer hardware in the wild. I spend time every month looking and the options for running a proper upstream kernel, on an Android based laptop or kernel, and every time "upstream support" is added as a crtieria, the options drop to zero.

I've never wanted to be wrong so much before, but again, I look into this pretty regularly and am involved in some development efforts that expose me to some of these realities first hand (I run everything on aarch64 except my gaming PC). It's sort of amazing, actually, to boggle at how much collective time has been spent by some many random devs at random companies and then painstankingly re-discovered by OSS folks, especially for phones/SBCs.

(granted, if you can boot upstream, it's all downhill from there these days)