Xenix was very interesting. We used a Model 12 at work with two terminals and a 12meg hard disk. Ran our accounting and a database on it for several years in the early 80's. Later, I had a Xenix system at home - SCO Xenix 286. I was fortunate that a friend of mine gave me many software packages, still sealed, after his company started phasing Xenix out. I used the 286 system to tie together my packet radio system. Worked really well. Unfortunately, I got rid of he stuff a long time ago.
I'm still trying to get a Xenix system runnig, just for kicks. I recently aquired a complete SCO Xenix 386 package with 3.5" disks, software key, and all the manuals. Currently, I don't have a working 386 system to install it on. But will someday.
Bill