Should we keep the StaticAnalyzer/Core/Analyses.def file?

It’s not obvious what’s the design boundary across AnalyzerOptions.def and Analyses.def files?
Should we aim for merging these two?
If so, IMO we should prefer the -analyzer-config XXX=YYY style.
What do you think, how could we phase out the old ‘flag-like’ configurations in favor of the -analyzer-config?

What’s your opinion about this? @NoQ @Xazax-hun @martong @Szelethus