Define "relevant". Tumblr is never going to be The Next <insert many-billion dollar social network here>, but it does have a road to profitability and long-ter

Define "relevant". Tumblr is never going to be The Next <insert many-billion dollar social network here>, but it does have a road to profitability and long-term sustainability now that it's being run by people who at least vaguely understand and respect its userbase.