Been a while, but broke 6K on Server Fault yesterday.
Seems to me like the number of questions I can answer is steadily dropping, as so much of the low-hanging-fruit turns out to be duplicates of previous answers. The questions that remain are very incident-specific, and most of then deal with details I don't know about.
But still, 6K is still nothing to sneer at. As of today, I'm ranked #42 on the site.
(Previously.)