Thanks for the answer!
I don't know to what degree it's sensible to regard the following as a metric. However, it does help in putting things into perspective. My belief is that Vanilla OS is directly competing with the whole uBlue ecosystem, even if one is Debian-based and the other Fedora-based. As such, I am curious to know how the custom image ecosystem of Vanilla OS is. Like, does something like this exist for Vanilla OS? (FWIW, there was another website that made browsing through these a better experience. But, sadly, I couldn't find it.)
Yup.