> snapd itself is distributed as a snap, which seems like a very poor idea to me
I took this as a "vote of confidence" that snap could self-host snapd.
Hosting via snap means they can push updates and not have to wait for users to `apt update; apt upgrade`, as snaps auto-upgrade without user intervention.
I don't know of other benefits, though.
It doesn't make sense for open-source software built with traditional tools by the distribution maintainers themselves to be in snap/flatpak.
I note that on Ubuntu 18, snapd itself is distributed as a snap, which seems like a very poor idea to me.