Sure - you're benchmarking something a bit different from whether ARM is ready for "server dominance". You're essentially benchmarking Amazon's prices to early adopters of ARM vs the cutthroat x86 cloud marketplace. That may be interesting for many people but tells you little about ARM hardware.
We had extended support for a couple of years but now it's dead dead deadski.
Like any other large industrial org, there's some bits of million-pound kit with integrated, essential XP. Likewise old essential software where the support has literally retired, running on 2003. We've got roadmaps for replacing it, but they're not instant.
We manage it as best we can. But broadly we're just about to go to 10 on desktops, so we're not as bad as the police!
Glad to hear it. When I worked for a NHS software vendor a couple years ago there were still XP workstations about. I guess it probably varies by the trust as well.