[jasoneckert]

I don't think any mainstream OS ever dies - instead, they often enter the hobbyist realm. Amiga OS and VMS are still actively developed this purpose (just not something you'd use in production). I imagine it's the same for OpenIndiana as Solaris had a large user base back in the day.

[Aaron2222]

OpenVMS[0] is very much primarily a commercial product that people use in production. The hobbyist program is secondary to that.

[0]: https://vmssoftware.com