Please see https://xyproblem.info/ and let us know what you're
actually planning to do.
The modules are typically closed, and implement quite a lot of
interfaces that you can use to customize their behavior. In many
cases, invasive operations like in 6.x are no longer necessary. There
might be a few cases where they are still necessary, but it should be
the last resort, not the first choice.
7.2 is extended in a totally different way than 6.2, and you should
embrace the new way as much as possible, rather than trying to bring
the same techniques forward just because you used them in the past.
