Completely agree with the first purpose but would never use wikipedia for the second purpose. Its only good at basics and cannot handle complex information well.
Like, if there's a subject about which you aren't personally an expert, and you have the choice between reading a single review paper you found on Google or the Wikipedia page, which are you going to choose?
[1] In fact, talk pages are often ground zero!
This is a good use of wikipedia: "Like, if there's a subject about which you aren't personally an expert, and you have the choice between reading a single review paper you found on Google or the Wikipedia page, which are you going to choose?"
But that is like skim reading or basic introductions rather than in-depth understanding.
No? How do you learn stuff you don't know? Are you really telling me you enroll in a graduate course or buy a textbook for everyone one?
Like, can you give an example of a "deep dive" research project of yours that does not begin with an encyclopedia-style treatment? And then, maybe, check the Wikipedia page to see if it's actually worse than whatever you picked?
Again, true domain experts are going to read domain journals and consult their peers in the domain for access to deep information.[1] But until you get there, you need somewhere you can go that you know is a good starting point. And arguments that that place is somehow not https://wikipedia.org/ seem... well, strained beyond credibility.
[1] Though even then domains are really broad these days and people tend to use Wikipedia even for their day jobs. Lord knows I do.