It can go either way. The smaller fandoms I was involved in on LJ seemed to stick around only out of inertia, and probably haven't been largely affected by the recent changes.
But if my suspicions are correct and SUP kicks their reinvention of LJ into a "FaceBook for hipsters", things are going to get to the point where SUP might actually start actively attempting to chase off communities which aren't "trendy and hip". If/when that happens, fandom won't have any choice except to move, whether their friends are still glued to LJ or not. It'll become a strictly blogging site again, but since most users really don't blog all that much (in favour of microblogging via Twitter, FB, or in the case of fandom, Plurk) it's a losing proposition for LJ.
no subject
But if my suspicions are correct and SUP kicks their reinvention of LJ into a "FaceBook for hipsters", things are going to get to the point where SUP might actually start actively attempting to chase off communities which aren't "trendy and hip". If/when that happens, fandom won't have any choice except to move, whether their friends are still glued to LJ or not. It'll become a strictly blogging site again, but since most users really don't blog all that much (in favour of microblogging via Twitter, FB, or in the case of fandom, Plurk) it's a losing proposition for LJ.