Personally, I'd very much like such information in WPSE. Even though I'm fairly new to WPSE, my suggestion is:
Jetpack route. Find a way to
expand or even
cheat the rules for the greater good.
For example: if you ask if plugin
a supports plugin
xyz grounds, then many may vote it as off topic.
However, if you post 6 different questions, each with some examples saying that plugin
a3 etc.) doesn't follow
xyz WordPress standards (e.g. internationalization. localization etc.) and ask the community if anyone can provide a complete list of such violation of standards or an idea to compile such a list for customizing that plugin according to
xyz WP standards, then it may fall under
WordPress development or
Plugin Development topics.
You don't even need to mention about plugin
a1's support for plugin
b. As long as plugin
b follows WP standards, asking for those relevant WP standards should be enough.
Also, to avoid the
too broad topic trap, instead of asking for a complete list of issues under
xyz standards that plugin
a1 doesn't follow, you may ask how to look for such violations of standards in plugin
a1. Then no one can complain if you yourself provide the complete research data as an answer (without asking for it in the question).
For example: there is a
t1 theme in Github that doesn't follow WP theme repository standards. To get it approved in WP theme repo, you need to check it with the
theme check plugin, follow requirements set by
Theme Review Handbook etc. etc. - now if you can figure out the appropriate question for this answer, then I'm sure you can also figure out half a dozen appropriate questions for your own research data.
These are just examples, use your own imagination to make the questions on topic. You may be surprised by other answers the community comes up with over time (if you can ask the right question). As one of my Physics teachers in university always used to say:
being able to ask the right question is part of the answer.
Any community that is not flexible enough will collapse. As this doc. clearly states:
We don’t run this site. The community does.
So this site will become whatever WPSE
community evolves into.