cfiesler, This weekend I was part of a great discussion about platform migration in #fandom. What's happening now with #TwitterMigration (and all types of online communities!) has both some similarities and differences. But if you're interested in one example of these kinds of migrations (e.g. #usenet to #livejournal to #tumblr and #ao3 in #fanfiction communities) here's my video essay about this research! https://youtu.be/xzQO-vkX3q0