There wasn’t any sharing of tech between studios. The only thing that happened all to commonly was that other studios poached our systems guys all the time to get games done. B5 was delayed 6 months because the entire team (minus a few artists) were hijacked to get the multi-player portion of Red Baron II working.
But yeah, as a whole the company was diversified, but studios tended to be pretty calcified in terms of content. Dynamix is a good example of a studio that actually was really diversified, and for whatever reason, got the axe too.