With all due respect, Charlie, and not having been in on any of your conversations with whoever "they" are at Boating, I don't think they have a long-term interest in high-performance boating beyond pulling in high-performance boat advertisers. They are, like everyone else in marine publishing, looking for another revenue stream. And who can blame them?
It's worth keeping in mind that Speedboat was launched by the same outfit that publishes Boating (they might have changed publishes since then ... Hachette to Bonnier... not sure) and that magazine got shelved when it didn't immediately deliver profitability. So at least based on history, long-term commitment to the market seems lacking. (Of course, if they are under a different publisher since the Speeboat days that could be a different matter.)
Just a point of clarification" Go-fast boat magazines are "slowing down" because the market is slowing down, to put it mildly. It's that simple.
This is not a defense of Powerboat. Not at all, the more the merrier, especially for all of you (and even me, because I am a freelancer). It's just a reality check.
That said ... power to Boating for recognizing the most compelling segment of the powerboating market.