Who is running mainframes anymore? A few select places perhaps but all the best have been buried.
Who is left? IBM and HP. Anyone else?
And HP killed the best version of UNIX, OSF/1, choosing their own HP-SUX.
Fujitsu and Hitachi I believe.
Almost all large banks are running mainframes.
The Government~! Of Course....
Go to any local city or county central officess and you will find a nice old multi-million dollar mainframe that does 1/10th of the work they need to do at 10 times the cost~!
I worked in one such place- The mainframe did nothing useful, there were AT LEAST 4 full-time people to keep it running day and night. One guys full-time job was to print this months reports, then shred and burn last months. No one ever look at these reports.
Their usuall topic of conversation each day? How to manipulate the rules and overtimes to maximize their retirement -last calculated at 78K per year- before they 'retired' and were re-hired as contractors, to do the same 'work' at $75K per year.
Hospitals! I’m a DC engineer for a hospital system, and the new mainframes are very slick, sleek and quick to deploy. They’re still working out the bugs, but we recently integrated a newly-purchase Z10 with our SAN. Going on just short of a few weeks from unpack to power-up was pretty impressive.