this is not an argument, this idea that non mainstream is better is harmful , you could and should use bsd over Linux for real argument like loving the idea of "monolithic os", the problem whit the Linux foundation (one or all), or the problem of abundance nesting in most of Linux but it inst about being mainstream, they still exist project whit difference approaches some less orthodox, or non corporation, i think Linux have more robust ecosystems, the thinks works out of the box is a and approach who let people let in the ecosystems like corporations, example if you don't want systemd make a distro(share it please) or use one of the already existing once LTS or rolling realizes approach.