> Other than just than "we can" and historic interest, I can't imagine why anyone would choose to run System Vr4 over 4.4BSD

Nostalgia is my guess.

SVR4 on Amiga was the first SVR4 commercial release IIRC. Solaris 2.x came later, but not much later.

At Sun we had a saying for referring to garbage from the SVR4 that we had to fix, rewrite, or terminate with prejudice over time (think STREAMS, XTI, and all that, but also much of userland): 'it came from New Jersey'. So, yeah, I wouldn't want to run SVR4 for any reason other than nostalgia, and honestly not even nostalgia. For me nostalgia is for OpenSolaris and such.