3b1 OS

[Dr. Arthur Wouk]

i am contemplating buying  a 3b1 for home use. one of my consultants
on this thinks that release 3.51a of the unix for the 3b1 may not be
release 3 of SystemV. is this true? if so, what handicaps are there
for the user of earlier releases of SystemV? what level of support is
at&t giving to OS upgrades for the 3b1?

email reponse please, since i don't think the rest of the readers of
comp.sys.att are interested.