I am still actively maintaining Pop!_OS. COSMIC has not changed that aspect of my job. Just within the last week I packaged Linux 6.6.8, Mesa 23.3.2, Just 1.22, Rust 1.75.0, and updated Popsicle’s dependencies to fix a bindgen build error with recent versions of Clang. We have a systemd update that was packaged today, and I’ll be doing another linux-firmware backport soon. So I don’t understand why you’d think it is stagnant. We’re even shipping Pipewire 1.0.0 by default, which Ubuntu hasn’t yet done in the latest version. People usually complain that we update too often.