I think
that's better than extending the 'oldness' limit, as there are
some machines (like DEC Alphas, IBM RS/6000s, Sun or SGI workstations,
etc) that I'd consider as valid for this list
However, I have run Windows NT 4.0 on both DEC Alpha systems, and on an
IBM RS/6000 box** .
(** I'm probably one of the .0001% of people
who has seen a Windows NT
desktop on a PowerPC system)