The difference is important, though: That consumer-grade six-core i7
machine will most definitely not be functional in twenty years, while I
know of quite a few VAX-11/750s (~30 years old) that are still running
just fine. That was one of NetBSD's earliest supported systems, and the
VERY first one, I believe, (Ragge?) for NetBSD/vax.
Let us not be too quick to de-support for the sake of de-supporting.
The maintenance and testing overhead is minimal. The latter can be ZERO
if we put it on the users of, say, VAX-11/750s, to do the testing on
those machines and report bugs, preferably with patches. (I will, once I
get my 11/750 reassembled)