Yeah, the second "borderline" is a typo, and should read "open-and-shut" or something. Sorry, message board comments are the log(1.1)th draft of history.
I also stopped contributing to Wikipedia. The places I would have written in are all related to my work, and I found it intensely frustrating to be edited and incorrected by people who knew less about my field but more about Wikipedia's rules. I can see why it's so off-putting! But it later occurred to me that that's as it should be: it's what the project is getting at when it talks about "No Original Research". Wikipedia is a tertiary source; it's a directory of other sources, a map of the available literature. I can't just go into Wikipedia and write how macOS Seatbelt works, because I am not myself a reliable source; I'd be a guidemark on the map pointing to nowhere.
Instead, what I should be doing (to the extent I care about improving the encyclopedia) is writing secondary sources that the encyclopedia can eventually cite. I'm not supposed to be writing on Wikipedia (at least, not in my areas of expertise); I'm supposed to be writing elsewhere.