I tried Aeon, mainly because it's atomic/immutable like my currently preferred distro, Fedora Silverblue. Aeon makes revisions to the core OS file system by synthesizing a btrfs snapshot and then switching over to it. If you must install a large number of system-level RPMs on an immutable base, Aeon manages the load much more gracefully than rpm-ostree, which is a definite advantage over Silverblue. While running, Aeon was difficult to distinguish from Silverblue. I found that the installation of Aeon rigorously enforced FDE and TPM 2.0, which is the only thing that put me off.