[boost] Why do we build debug variants of our compiled libraries?

Looking at the Jamfiles for Signals, Python, and the other libraries in Boost that have compiled parts that users link against, I'm wondering why we create so many variants by default. Why would a user want to link against the debug version of Signals, for instance? The only reason I imagine would be to debug Signals, but I should hope that the average user does not need to debug that code. If I dig around /usr/lib and /usr/local/lib on my Mac, I only find optimized libraries: nobody else seems to bother building debug variants, so why should we? Anyway, my recommendation is that we stop building debug variants of compiled libraries by default. It's easy for the user to build them if they are really required. Doug