Sort of a side point, but this got me wondering...Is there something inherently less stable about these older chips, or maybe is their stability somehow a function of their lifetime that would really matter here? My own anecdata (which is from a far smaller dataset than what I imagine Microsoft would have access to) would suggest that this isn't really the case, at least for anything otherwise capable of running something like Windows 10 or Windows 11, but I'd be interested in reading more about it.
Is it that old systems tend to not be physically maintained as well thus resulting in cooling issues and more overheating?
Is it that these "crashes" are application crashes due to the attempted execution of instructions in (newer) x86 extensions not implemented by these (older) chips?