[pjmlp]

They definitely are, not all though, HP-UX is on life support.

However Aix, Solaris (and Open Solaris derivatives), z/OS, IBM i (AS/400), ClearPath MCP, OS 2200, are still being updated and sold.

That list is not only UNIX systems.

[drob518]

Exactly. They exist but just barely.

[pjmlp]

Enough to pay salaries of those making them go.

[drob518]

Enough to pay the salaries of those keeping them on life support, more like. I wouldn’t say they are going anywhere. To be clear, that doesn’t mean they are going to die anytime soon. Mainframes are still around and getting refreshed and upgraded, too.