Like much else, I stumbled upon this. I was aware that System76 manufacture 'pure' LInux computers. I was unaware that they had been publishing an OpenSource Linux operating system you could download and install on your computer.
They got into the OS publishing game, I think, when Ubuntu dropped support for the Unity desktop; or something like that. At any rate, System76 has taken the gnome-desktop under its wing and now employs gnome 40 as its Standard GUI. Click the following link to get an idea what they've done with it; but only in the latest version, 21.10:
https://cdn.shortpixel.ai/spai/q_glossy ... esktop.jpg
OOTB it supports tiling. What looks like cairo-dock at the bottom can opens apps, themselves; but the middle icon which looks like a cube opens a display of folders containing categorized application, Anyone familiar with Android would feel right at home. It goes without saying that it also supports virtual desktops. That dock's location and size is configurable. While I was able to operate the GUI via a mouse, I suspect that it can also be used by those who have 'touch-screens'.
Pop!_OS provides access to Ubuntu's repos via apt, and a Pop!_shop which anyone familiar with Google's Webstore will recognize. Pop!_store integrates synaptic with Ubuntu's regular and Flatpak repos. Additionally, from Ubuntu's repos gnome-software-manager can be installed providing even more package management options. [Edit: further reading suggest that it may break things. But synaptic can be installed]. Discovered the latter while looking for some way to execute shell commands. The Pop!_Store, itself, doesn't appear to provide applications to do so. But someone on reddit posted about the gnome-software-manager workaround.
AppImages are also supported. From Pop!_OS burned to a USB-Key via rufus. I wonder if EasyDD would have worked --rufus did not offer the option NOT to format the entire Key as an ISO96xxx device, I could access AppImages on my hard-drive (selected partitions mounted automatically) and run several.
Portables, however, could not be initiated via their 'launch-scripts': hence my above search. Oddly, however, in several instances where Mike Walsh packaged an AppImage as the 'motor' for a portable, those applications could be initiated by clicking the enclosed AppImage. What is lost, of course, was isolating such application's configuration files and caches within their own folders.
Pop!_OS has numerous methods for encrypting, up-to-and-including the entire drive on which it is located.
Edited: See wiak's post following. I guess I was wrong. Pop!_OS does not employ systemd.
It is published in three 'flavors'; one for RasberryPI; and one each for intel and nvidia graphic managers.
An interesting distro for someone having far greater skill than I to explore as a potential Woof candidate; or as a "debian-dog".