- Lack of 32-bit support
I think I understand this. After all, 32-bit machines may become "unusable" when the clock overflows, but isn't that a few years away, and couldn't some solution be found, even if kludgy? Some of the 32-bit hardware was of very high quality, and still runs perfectly. I'd hate to spend a few hundred dollars each to replace all those systems.
I believe there are people working on this, it's just not yet ready for prime time. It's probably harder than it would have been simply becauase RH did not provide the info/scripts/tools for doing a 32-bit build.
An exercise in futility! Centos 6 will be supported until November 2020.