Enable rpmfusion for media codecs and things like libdvdcss or unrestricted mesa drivers: https://rpmfusion.org/Configuration

https://docs.fedoraproject.org/en-US/quick-docs/installing-plugins-for-playing-movies-and-music/

Fedora comes out of the box with a curated flatpak repo. You might want to replace that with flathub: https://flatpak.org/setup/Fedora

Imho, there's no reason not to enable disk encryption for root. Luks configuration during setup is very straightforward.

If you don't have nvidia graphics, enable uefi and secure boot (no legacy options). Fedora works well with it out of the box.

Why not move to Debian? Ubuntu was born in a time when Debian stable had a really long release cycle and wasn't desktop ready. But times have changed. Debian is a great desktop without all of Canonical's Ubuntu "experiments" like snap.

Why don't you install flatpak on Ubuntu, make the packaging migration before doing the OS migration so you can evaluate your workflow with the new packaging system? Afer you're used and confident with flatpak, backup and restore the flatpak folder into fedora and you transition should be smoother (don't need to worry with 2 stuff at the same time)

Plan sounds alright. A couple of notes.

• Don't forget your passwords and bookmarks stored in browser when doing the copy over.
• Personally, I'd use Full Disk Encryption (FDE) because it's a default option on the Fedora installer and is more secure, and well-tested, and easier to configure.
• For your planned installables, I'd keep a list of apps you regularly install in a file somewhere (even better would be a script which installs them all) then when you distro-hop it's easier as you can just change your script for whatever package manager.
• Some of your apps will store their configuration in your home directory in a dot file, you might be able to copy these over one-by-one for each app.
• Have you decided on Fedora Workstation or Fedora Silverblue? Each have their merits and demerits, and its worth investigating.

Honestly, if you like Ubuntu but dislike Snaps, Linux Mint might be a better choice than Fedora if you're not as comfortable with Linux. Mint is basically "Ubuntu without all Canonical's garbage."

Flatpak apps will use the same dotfiles as apps installed via traditional methods, however the storage location will likely be different. Most dotfiles will be contained within their respective flatpak app directory under ~/.var, so you can cherry pick which settings you want to bring over.

Yes, but if you intend to mainly use flatpak you might want to try fedora Silverblue

Are you leaving behind the dotfiles because you don't want to bring over any of your old configuration?

For whatever it's worth, you can remove Snap support from your Ubuntu system. If you want more current software, AppImage and Flatpaks are good for that.

This has been solved for the most part: https://github.com/popey/unsnap

The few system snaps for things like Gnome updates shouldn't impact performance.

I want to write a script for this app config backup stuff once. Also working on Windows, but maan I have low motivation on that one haha.

You can use your configs, relevant for me are

• firefox: ~/.mozilla/firefox can stay if you keep using Fedora Firefox
• thunderbird ~/.thunderbird/ copied to ~/.var/app/org.mozilla.Thunderbird/.thunderbird
• libreoffice from somewhere to the flatpak directory (useful if you have a custom dictionary, autocompletions or interface)
• qgis, element

Many other apps use the same structure with a profile folder so easily transferrable.

In firefox and thunderbird you either delete the whole contents and replace everything, or you only paste the contents of your *-default-release folder in the new default release folder, after deleting its contents.

Flatpak apps need to be ran once, to create the ~/.var/app/ subfolder. After that you can close them and replace everything. If you delete that folder, or move it somewhere as a backup, the settings are reset to default. Pretty cool.

If you want to try the new image-based distro model, I can highly recommend ublue and their installer. It has all the codecs out of the box and also an nvidia version which will never break basically, if it should, you can roll back to your previous system that worked.

It is a very cool distro model, and ublue has loots of customizations. If you never tried KDE I recommend their kinoite-main (do not use any -nokmods, these images are outdated as they removed kmods from -main !)