i think what the chaos did was enable more individual contributors. you didn't have to join the BSD team to get a core OS tool accepted into the system. anyone could just mix and match the tools and apps they liked. it's not that BSD prevented that but that they just didn't invite it. you can create your own spin of a distribution and if it gets enough users and contributors it gets accepted as an official version. there is even a debian variant using a BSD kernel. try making a official BSD spin using GNU coreutils.