I see all these nice C++ libraries like Facebook folly and then I see that they bring in boost and megabytes of include files for trivial stuff bringing in stuff I absolutely don't need (or ever will, in fact most of it is for dealing with legacy compilers and OSes I don't care about). Maybe it's just me but I don't like half an hour compile times. Am I missing something or has everyone else using it just accepted the compile times ?
"Bringing in Boost" doesn't cost you much at all in terms of compile time. Using some of the advanced template meta-programming stuff in it may, but basic things like the legacy compiler and OS support you mention are largely using the C preprocessor and take very little time. In other words, give it a try--I'm sure you won't have half an hour compile times just by using Folly.