It's somewhat plausible that 20 comments a day may be too much (in someone's perception), or that it's better to develop certain kinds of posts more carefully, maybe even to avoid certain topics (that would shift the focus of conversations on LW in an undesirable direction), but it's not a case for not posting at all.
(That is, the questions of whether Konkvistador's posts are slightly harmful for the community (in what specific way) and whether the best intervention in response to that hypothetical is to discontinue posting entirely don't seem to me clearly resolved, and low rate of posting seems like a better alternative for the time being, absent other considerations.)
whether Konkvistador's posts are slightly harmful for the community
It is ridiculous to argue that an eloquent and prolific poster who actually seems to have read the motherfucking sequences and doesn't get tired of trying help new people access them (a rare trait these days) is causing harm.
Even if that was so for every single thing he wrote, and note that when Lukeprog cites against his argument that productivity and openness to outside ideas on LW is lower than it should be, the bundle includes many of Konkvistador's posts as examples of openness and...
If it's worth saying, but not worth its own post, even in Discussion, it goes here.