This is more or less how I think of AO3 too. Though the occasional new comments about how I posted a fic that's been up there since 2009, 2010, 2011, 2012, etc. still bother me. (Apparently, using the series feature is now considered bad, so I should take down my series of individual, but related one shots of the same series and repost them as a chapter fic. I think not.)