As an engineer I can see this discussion has missed a major role of
computers/processors. There is 'new' hardware being manufactured and
designed now that is very much less powerful than 'old' hardware in the
form of embedded systems and microcontrollers. Think the OS that runs
your toaster.
In my opinion a (not nesscery inital) goal of the system would be the
ability to support a given CPU based on some notion of the required
capabilities of the CPU rather than its age for a start. The assumption
that old CPU's do not nessacery have that capability while new ones do
is incorrect.
GNU/Linux runs on some more powerful microcontrollers but with the
modularity of the Hurd I think we could do even better (forgive the
comparasion). As embedded systems become even more prevaliant and
powerful I think they become a relavant target for the Hurd and
something to aim for.
That said having the Hurd run on one CPU is far better than the Hurd not
running on all CPUs.
Just my 2cents.
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