We run a lot of CentOS 5 virtual machines (and some physical ones! ; and some RHEL4! , and a few Fedora core 8 and 4 !!!), with no end in sight... :(
It is a huge concern for the Infra team, a source of many headaches, and we need to go through oops to keep them running, but:
- Clients don't want to move from OLDPRODUCT that requires extremely old php.
- Dev team is not interested in migrating OLDPRODUCT to a modern platform, or even try to put it in a container. Their eyes are turned to the shiny NEWPRODUCT that is seemingly never fully coming to production (only one client has signed for it).
- New clients are still regularly signed on OLDPRODUCT.
- No one in the org wants to pay for for a migration anyway.
- Since some clients have complained about poor apparent security, what was visible was just hidden behind newer haproxy.