AIUI this is basically how flatpak does it; the file picker is called a "portal" and is indeed how you pass in files that the program couldn't reach by default.
And that is a welcome change. What I dislike about the project is that it want to be a packaging solution as well, and it is simply not a good one at that compared to the new generation one, which is Nix. Linux really shouldn’t copy Mac and Windows on everything.
