@se7en@freespeechextremist.cowe run PureOS (sytemd and Wayland) with various things optimized for mobile. We want to give people a great mobile user experience out of the box with default apps and app store ecosystem. This is why we choose GNOME and created libhandy https://source.puri.sm/Librem5/libhandy but anyone is be free to change anything or run completely different operating systems if they want to.