I know there must be, but are there examples of people using the linux kernel as a base but having a radically different userland from traditional linuxes? I fe

I know there must be, but are there examples of people using the linux kernel as a base but having a radically different userland from traditional linuxes? I feel like all the Gnome and KDE Distros feel really samey whether they are arch or debian based (this isn't necessarily a bad thing!).