The main feature of Bazaar is for us is it doesn’t support rpm-ostree package layering, doesn’t try to install themes that arbitrarily add files to /usr, and doesn’t know what an RPM, DEB, or otherwise are.
Being a flatpak-first and flatpak-only store means it can be the premier place for Flatpaks, which beside from Brew and Containers are the only thing we care to show an end user.