I seem to recall from past reading of the AppKit source code that one solution to (1) was to have version specific workarounds that worked for e.g. RecklessApp

I seem to recall from past reading of the AppKit source code that one solution to (1) was to have version specific workarounds that worked for e.g. RecklessApp 39, but would no longer work for RecklessApp 40. I assume that the developers in question were informed of the fact, and now had every incentive to fix the problem.