The maintainer has stopped cutting releases[1]. Since the last release,
1.4.9, includes a dependency that is filled with hate speech[2] it's all
the more reason to package the unstable version and eliminate that
requirement.
Moreover a number of fixes, improvements, and features have landed
since.
[1]: https://github.com/beetbox/beets/issues/3625
[2]: https://github.com/NixOS/nixpkgs/pull/90504
Co-authored-by: Doron Behar <doron.behar@gmail.com>