uh oh, that's funny.
Since perceptual maps everything to in gamut anyway, and that includes the shadows, hence the black point, something akin to BPC is happening anyway, clicked on or not...
So their reply was somewhat... uninformed? Dismissive? Anyway...
Relative Colormetric is where we need BPC, and implementing it, or something like it, seems to be an issue for anything outside of the Adobe workflows. Basically they have to come up with thei r own versions. ACE was released as a stand alone CMM at some point, supposedly with access to BPC, so other app, driver, or RIP providers should be able to take advantage of that, but I haven't seen anyone doing it.
Tyler