> This artificially creates an "eternal september" almost everywhere.

This is also why the 'powermods' are so damaging: without proper, attentive moderation an influx of new users invariably leads to a decline in quality.

Half the subreddits in /r/all are so homogeneous that it's impossible to tell if a post was in /r/muderedbywords, /r/nextfuckinglevel, /r/damnthatsinteresting, /r/unexpected, etc.

And that's not to mention all the bots...