Very interesting. My rig is still on Pop mostly because I've just never had issues with it. I use the Liquorix kernel for a little added spice.
On my laptop I've been playing with NixOS lately (used to run Arch btw). I love it so far, but haven't explored it for gaming.
Pop has not received feature updates for years, because the dev team focuses on implementing Cosmic.
Given the overall progress of Linux Desktop environments, this might have led many users to switch away from Pop.
From Wikipedia, the free encyclopedia
Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).
Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.
Community icon by Alpár-Etele Méder, licensed under CC BY 3.0