Not sure what year they arrived, but Ohio University still has an entire lab equipped with old Sun systems. Intro to programming or whatever all engineering majors have to take have their class in that lab… have been there for at least 15 years to my knowledge.
Sun had a System adminstrator 1 class that lasted a week. I was lucky to be sent by an employer and it was fantastic and granular. Essentially the class was bring up a Solaris install in such a granular system the we started with Inodes or just below Inodes. The entire OS and it’s supporting abstractions were revealed.
If this lab is used for that type of class it would be worth the trouble to keep it running.