Stuff is still getting posted to fic comms, or showing up in recs comms, or being posted in individual LJ and/or DW posts. I definitely prefer it when the people posting are offering up links to the AO3 version as well as the LJ/DW posts -- I've seen a few people including the AO3 link on their own LJ posts (or in their recs posts on an LJ comm, as an alternative to the LJ link they also offer), but a lot seem to think just one link to a given story is sufficient (or possibly that anyone following an LJ comm is happiest getting LJ links). I've picked up the habit of, when provided with a link to an LJ-posted story, going to AO3 and searching for the author's name. I've found the AO3 version of the same story often enough to persist in the habit. (A day or two back I got recced to a story that was LJ-only -- and in 21 parts, some of them broken into a and b sections -- and it filled me with woe. The authors are on AO3, they just haven't uploaded all their old stuff. Mind you, the last time I found one of their Big Bang fics and sucked it up and saved the webpage it was saved to and used Calibre to convert it to MOBI, it turned up on AO3 maybe a few weeks afterwards.)