Personally I think it would be of great benefit if Enterprise vendors just stopped doing that extremely long term support. It just enables the people who want to pretend they can stop the world around them and those people are bad for everyone, especially in a security context but also because they pretend that “stability” is achieved by using old versions.
This is how I know you need to learn more about the Enterprise, about long-term support, and stability. Everything you wrote sounds like “Smoke detectors and seat belts are for chumps”