install solaris and experience why mankind doesn't do solaris anymore (it is not entirely because oracle is a bunch of cunts who pissed on sun's legacy, although that sure didn't help one bit and tanked the remaining marketshare)
sun was a great company (by large company standards at least) but I am fairly regularly reminded of how much they did wrong on a technological level, even if they were also regularly breaking new ground and generally trying to deliver value to users

THE NETWORK IS THE COMPUTER