Lukeprog listed lots of substantive recent articles, but I question whether they were progress, given the current state of the community (for example, I'd like more historical analysis a la James Q Wilson)

I think you're shifting goalposts. 'Progress', whatever that is, is different from being insular, and ironically enough, genuine progress can be taken as insularity. (For example, Rational Wiki mocks LW for being so into TDT/UDT/*DT which don't yet have proper academic credentials and insinuates they represent irrational cult-like markers, even though those are some of the few topics I think LW has made clear-cut progress on!)

Given the karma, it appears that the community is not convinced the criticism is wrong. Even if Konkvistador is wrong, he isn't trivially wrong.

I don't like to appeal to karma. Karma is changeable, does change, and should change as time passes, the karma at any point being only a provisional estimate: I have, here and on Reddit, on occasion flipped a well-upvoted (or downvoted) comment to the other sign by a well-reasoned or researched rebuttal to some comment that is flat-out wrong.

Perhaps people simply hadn't looked at the list of recent posts to notice that the basic claim of insularity was obviously wrong, or perhaps they were being generous and like you, read him as claiming something more interesting or subtle or not so obviously wrong like 'LW is not working on non-LW material enough'.