Make you wonder what they've been testing this on. Even NetBSD doesn't have a recent release for Itanium. Crazy that you can run NetBSD 11.0 on HPPA, but not Itanium, given that HPPA is in some sense the pre-cursor to Itanium.
More than likely in "government"; they are always behind and keeping legacy stuff around. I found Windows 1.0 floppies in a drawer, back-in-the-day.
Honestly more HPPA gear to test against than Itanium
Age is probably less relevant than current installed base/active users