I don’t mean to start an off-topic debate on this, but I just have to say that personally, I run into issues caused by using old software on our EL7 boxes all the time. For example, cgroup memory limits are broken on Red Hat 7 kernels as far as I can tell (most versions have a memory leak, but iirc the most recent has a panic instead). They’re missing all sorts of features that are useful for usability or reliability.
I’m just personally not convinced we really win much with the trade off as a society :p
Memory control group code is replete with bugs throughout 4.x kernels, way beyond RHEL 7. This is one of the big problems with getting locked into "LTS" kernels. It takes a long time to discover all the nameplate features that don't actually work.
I’m just personally not convinced we really win much with the trade off as a society :p