Last week, Perry Eaton of BDCwire asked me to contribute to this piece on post-9/11 rock music. Today, we continued the conversation, widening the scope to that period in rock that followed the alternative boom of the early-to-mid 90s and preceded the indie rock bloom of the early-to-mid 00s. Then we tied it all in to the present-day, and the recent announcement of the Jay Z-backed streaming music service Tidal.