You get upgrades every 6 months, but updates are rolled out constantly. For example Fedora gets the very newest kernels at the same pace as something like Arch

You get upgrades every 6 months, but updates are rolled out constantly. For example Fedora gets the very newest kernels at the same pace as something like Arch, even for older releases. Fedora 33 currently has the same kernel as Fedora 35. I would consider it "semi-rolling". It has major releases, and a few packages are pinned for the duration of the release, core stuff like glibc, systemd, GNOME, compilers / toolchains for various languages and so on. But the rest of the system is kept very up to date.