I scored a new Snapdragon laptop from Lenovo's outlet store for AU$799 (RRP ~AU$1500). Let's see what Snapdragon can do! I'm very keen to test out Arm64 HyperV and booting Linux on it.
(Lenovo/DHL even delivered it on a Sunday. That's how desperate they are to get rid of these things 😆)
A new CPU architecture is not enough to prevent the spread of pre-loaded crapware (McAffe) :( Otherwise, only a very small number of non-Arm64 processes out of the box
Obligatory CPU-Z shots

So Hyper-V On Arm64 and standard Linux does not play nice [right now]😭 It appears to be a regression in the latest W11/Hyper-V version (24H2), as there are plenty of reports of it working correctly before.

Linux will not boot when the VM has more than 1 vCPU configured (ref: https://www.reddit.com/r/Surface/comments/1dmzpzt/comment/lt6xtop/ ) .

Even on a single core, it feels a slow, apparently there are timer related changes in the WSL2 kernel ( https://www.reddit.com/r/Surface/comments/1dmzpzt/comment/m5bqgrm/ )

WSL2 can use the full contingent of cores. I'll throw some Linux kernel compiles at it...