On Jun 6, 2023, at 2:33 PM, Tom Gardner via cctalk
<cctalk(a)classiccmp.org> wrote:
May I suggest compatibility is like pregnancy – you either are or you are not.
I'm reminded of a comment about the PDP-11 family:
"A PDP-11/xx is compatible with a PDP-11/yy if and only if xx == yy".
:-)
paul