Personally, I am not a fan of this proposal. I'm one of the few people who actually like Fedora Flatpaks. I like
- The focus on FOSS
- The focus on more open software (standards that are not patented or have royalties)
- More consistent build practices
- Security (all apps use the latest Fedora Platform runtimes, pull all their dependencies from Fedora repos)
- Better deduplication (vendored dependencies are all RPMs, Flathub dependencies may pull different versions or built differently which would limited deduplication)
Though they're not perfect. Perhaps the biggest issue is the lack of codec support. Personally, I think it would be better to rework this proposal to instead filter out the footguns in the Fedora Flatpaks, such as media players and browsers.
I also don't believe there's any plans in the proposal to allow the user to easily remove the filter in the GUI, even though there is a toggle to make Flathub available in the GUI. The two proposals would in effect make it more difficult to obtain software curated by Fedora.
I think I had this bug before where I had to change the tty to actually get into the graphical environment.
I used Aeon before, it wasn't bad. The default apps were better than Fedora Silverblue's (it had Tweaks preinstalled, didn't have Firefox installed as an RPM). It uses Distrobox rather than Toolbox, which is nice because Distrobox lets you specify a custom home for each box. Though Distrobox hasn't seen any development these past few months and their decision to use POSIX compliant shell script seems like a maintenance nightmare. Toolbox uses Go.
But my biggest problem with MicroOS is that I don't feel like the update mechanism is as robust as Fedora Atomic. At the end of the day, it's using zypper and btrfs snapshots. It doesn't have the same protections against configuration drift, you can only rollback to versions of the OS you've previously installed (with Fedora Atomic you can rollback to any specific commit, even ones you've never installed).
And Fedora Atomic's bootc is super nice for customizing your image.