To answer the original question, I’ll echo what @Sean said. We have developers and users who joined after we dropped support for CentOS 6 and will have never done such a migration. This doesn’t mean it’s impossible. Upgrade foreman from 1.10 to 1.20 is a recent example.
As already has been said, there’s no SLA. That means you need to be somewhat lucky that someone responds. The best way to increase your chances is to be clear about the problem.
- Provide a clear problem description, ideally with specific errors and stack traces.
- Describe the environment. OS, versions, special things you think people should be aware of.
- Things you have already tried and didn’t work
This may be just true for myself, but because I’m busy, I’m more inclined to jump in when I need to put in less effort.