WBCN had sunk so low that the only shows that were getting ratings was Toucher & Rich and the Pats games. Both programs went to the Sports Hub and took their audiences with them. What little was left was probably spending some time with WAAF, WBOS and WFNX anyway. There were clearly too many rock stations in the market, and with all of them playing the same core group of artists (Nirvana, Stone Temple Pilots, Pearl Jam, Green Day, RHCP, Alice In Chains, etc) it was time for one of them to go. WBCN was the Stern/Pats station since the late 90's and the "talky morning show"/Pats station after Howard left. It hadn't been about "The Rock" in awhile.
These days it's tough to find success stories at the rock formats nationally. The ones that work are usually the heritage stations like WHJY/Providence, WDVE/Pittsburgh or WIYY/Baltimore. Even in those cases, it's not surprising to find longtime talk intensive personalities in key dayparts or some sports programming. There are exceptions like WRFF/Philadelphia, but they are the only station in that market playing the 90's grunge stuff. It works, which is why all the Boston rockers play it. But there's very little new music getting played anymore, which means rock music on the radio is beginning it's slow, eventual death. Sad.