stacktraces could be implemented without boost
Since the boost::stacktrace depedency seems to be really annoying for some users, we could maybe reimplement it using backward-cpp. This is a header-only library that can reimplement nice backtraces using only libdwarf.
We don't always request libdwarf (only when doing MC), but that could be a valid alternative for users that don't have a working boost::stacktrace, I guess.