From my experience on the Rocky Linux forums are people who use Rocky Linux to run their workstations on or other organization as well and those aren't the type of people that run ancient hardware. When you are talking about the average desktop user for example here on linux.org, I've yet to see anyone running a RHEL clone on ancient hardware. I mostly see people use the recommended lightweight distributions(Puppy, LinuxLite, AntiX, etc) on older hardware here, and most people here run something Debian, Ubuntu or Arch based. So in reality most RHEL clone users are the same type of users that would run RHEL except for they chose the alternative because of not needing a subscription.