Void is rolling release IIRC. The package manager is quite fast and gets the job done. The pain point is that Void has a lower selection of package in its repos compared to say, Arch. Some good stuff is there (for example I was looking for a third party Spotify client ncspot? Back in the day and it was packaged in Void's repos) but if someone uses niche stuff a lot, there can be issues.

Of course there is Flatpak support. And the system itself is comparatively lean and fast. I don't think my installation of Void came with plenty of pre-installed apps.

It ships in two builds : glibc or musl. The latter one is less favored because it only makes life tougher honestly. Runit support is a strong point of it though personally I don't have any anti systemd qualms.

The documentation is basic and okayish. I still often go to Arch Wiki since that's honestly the most detailed. Also, I just found that it's the highest rated distro on Distro Watch. I have distro hopped a long time and Void is decent. I still hold Debian in higher regard since it's slightly easier for a novice to get used to (though it's repos can be hold often old versions of software) and also because it was my main entry point to the Linux world.