Fortunately such "new choices" get abandoned very quickly. Making new solution instead of improving existing ones is counterproductive. Unless there is a large legacy codebase. Smart people have invented Unix principles to avoid that.
Not really. Best Foss projects do not always thrive. Git wasn't really better than mercurial. But it had happened to be published earlier, so it got wider adoption.
If you will create "next gen" desktop, you will just solve some problems of already existing ones and create your own. Maturity of software is far more important, than uniqueness. GNOME didn't evolve into its current state for no reason.
Not really. Void, alpine, gentoo are the only usable ones(besides non-systemd forks of arch and Debian). These are the only ones maintaining enough packages, providing enough documentation, not being just poorly maintained forks of X distro.
Fortunately such "new choices" get abandoned very quickly. Making new solution instead of improving existing ones is counterproductive. Unless there is a large legacy codebase. Smart people have invented Unix principles to avoid that.