The height of hard rock, especially in the Boston area, was from the mid-90s till about 2003. Prior to the mid-90s, WAAF was THE station for the harder rock audience, especially in the time after 1988. In 1995, when WBCN jumped from a broad AOR format to "mostly alternative," more hard rock crept into the area. By the late 90s, 101.7 WFNX was playing mostly nu-metal and rap-rock, which lasted until about 2003. For a time, you could hear bands like Tool, Godsmack, Staind, Limp Bizkit, Linkin Park, Distrubed, and others on 'AAF, 'BCN, and 'FNX, and all three stations had considerable overlap. I remember a promo WBCN used to run, something to the effect of "You don't have listen through all the static of that Worcester station to get your 'Nookie.' Get your 'Nookie' in Boston on WBCN." After 2003, 'FNX shifted back to a true alternative format, and 'BCN shifted a bit to a broader active/alternative hybrid format. WAAF would eventually adjust as well, and is, in effect, really an AOR station these days.
The point is, current hard rock (or active rock) isn't very popular right now. Especially in a market like Boston, where the rock audience is more an AAA/alternative audience. Perhaps hard rock did better years ago because several of the major bands were from the area (Godsmack, Staind), but that's speculation. It's been argued that the music itself isn't as good as it was 15-20 years ago, and that most current hard rock sounds the same with its raspy vocals, overdriven guitars, overcompressed "wall of sound" production. Hard rock seems to be surviving in more rural and "Red State" markets these days, but not in Boston.
Could there be a volatile hard rocker in the Boston area? Maybe. WAAF would be it. But a brand would need to be set up, promotion around town, and interaction with potential listeners. As everyone knows, most radio is corporate these days, with its multi-market contents, voicetracked "talent," safe playlists, and automated nights and weekends.
So as far as hard rock, right now most of your options involve the internet, whether it's streaming some of the remaining active rock stations which are mostly in the Midwest, Sirius/XM Octane or Boneyard, or another exclusive hard rock broadcaster.
My apologies for the long-winded post. I must be passionate about this...
Jacko