https://mathoverflow.net/questions/282869/the-enigmatic-comp...
> I regret to say I'm ending my participation in MathOverflow, for the same reason I decided a decade ago never again to edit Wikipedia. It's hard to express how disheartening it is to spend hours of volunteer labor explaining stuff---in this case, in a way that at least 19 MO users apparently found useful---only to have your work overridden by a smaller set of users, for being (part of something larger that's) "off-topic" or whatever it is. Who the hell has time for that? From now on, if I have math questions, I'll post them on my own blog. Was nice being here for 6 years; thanks everyone. – Scott Aaronson 3 hours ago
Wikipedia and stackexchange both aim at being reference works. There are different phases in the journey to that goal, and an unfortunate casualty of maturity is the loss of interestingness.
Strikes me as similar to startups, fun when small, horrible upon enterprise "maturity". Many people like the early stages, yet the latter is the goal...