I've spent a lot of time browsing and using plugin/extension marketplaces. One of the main questions that you have when deciding on a plugin is your last one question - specifically the quality of the plugin and if does what it says it will do. But when I look at the EmDash marketplace, there is almost no way to judge the quality of the plugin (especially the UI/UX without screenshots) or if it actually does what it says it will do. And that is usually the first question you ask before going into the security and maintenance. Because if it looks terrible, slows down your site, and doesn't really work - who cares if it's maintained and secure?
At this point you could probably just run it through an LLM yourself and ask it if it does what it claims, if the code is straightforward, or if there are any seemingly obfuscated bits. If something is on a safety-critical path, you should probably do the review yourself.
But still social signals from others and especially screenshots are 1000x more important to me than an AI summary of the code base.
samtp - I think you're looking for the answer to two or more problems here.
So far EmDash has an answer to what I think is the most important question (IMO). Can I trust that a plugin is (relatively) secure? Yes.That's something WordPress haven't been able to do - so I'd say well done to the EmDash team! And, if I wasn't building my own CMS (with a very similar permission model) then I would probably be trialling it right now :)