> When the teens who use tumblr today become older, there might even be some emotional/sentimental value in Tumblr for them. Would it not be in danger of becom

> When the teens who use tumblr today become older, there might even be some emotional/sentimental value in Tumblr for them. Would it not be in danger of becoming something like LiveJournal? Where the users are an ever narrower segment of a slightly older demographic group, with no growth.