One thing I'd like to see saved for the historical value is Pyramid OS/x.
It was one of those things I'd have liked to see the internals of -- but I wasn't supposed to have that level accesss in Ed Services.
It is an interesting mix of both the SysV and BSD environments and it's a shame it's probably completely gone now.
I think the last work on it may have been at Siemens, since I think the last bit of Pyramid that was left was rumored to
go to SVR4 (I was there for the DC/OSx transition -- I worked on the courseware fixes and beta testing).
I heard from a friend that they may have gone to Solaris before the end hit. I think they were swallowed by Fujitsu.
Amazingly, I heard some of my SVR4 courseware stuff ended up in illustrations used in Solaris courseware. My name was in the illustration of the password file. A trainer hired at least 5 years after me went to Sun and I hear some of my stuff went along for the ride.
I long wished they had done the full Linux dual universe thing on a *BSD varient.
I'd be running FreeBSD on my desktop if I could just watch Netflix with it. Linux, Windows and MacOS have enough pull for Google to port their Widevine
Bill