If you want rolling release, you can just use Debian Testing or Unstable

I don't want to run an "unstable" distro. These outdated packages aren't acceptable.

That said, just use flatpak

What's the difference between a rolling release distro and Debian testing?

Yeah, I'm not gonna install the Zig compiler or NeoVim with a Flatpak.

There's a difference between a rolling release and an unstable version.