Isn't that Fedora you're asking for? There's also https://get.opensuse.org/leap/, but packages may not be much newer than Debian's. They say https://get.opensuse.org/tumbleweed/ should be very stable, yet rolling. You get Btrfs snapshots automatically.
When Debian Bookworm comes out I'm going to, as an experiment, give it a go paired with Distrobox. I'll install my CLI and GUI applications via an Arch Distrobox. Stable base, rolling and portable apps.