@AC "your apps aren't special"
Yes, they are. Like many people's
Unfortunately in the real world (probably quite far away from yours) people have to run legacy apps compiled for HPPA no one want to port to Linux or even recompile for Itanium because it costs too much money. The HP IA-64 boxes were a great way to move them effortlessly to modern platforms in containers, with good perfs.
HP-UX probably carries no more legacy old school code than Windows does, or even Linux for that matter.
To me, any Unix with good clustering and container support, a LVM that's almost exactly the same as the one you'll find on your Linux box serves my purpose and I see no reason to call it archaic.
I'm not in especially in love with proprietary Unices, but HP-UX did the job rightly. I will regret it.
Furthermore, that's off-topic regarding my post. HP will probably be just as bad supporting mission-critical high-end Linux boxes anyway. That was my point.