It wouldn’t surprise me if there were still a few production Itanium systems in server rooms somewhere, running some obscure or bespoke proprietary software that can’t be migrated to anything else. There are other more arcane systems still being limped along in businesses around the world, for some frighteningly critical applications in some case.
Itanium support being dropped probably has a handful of admins panicking, but in the eyes of the kernel developers it’s a case of “put up or shut up”.