>> 74% of installs are unofficial builds, not ones released by LineageOS.

One of the first versions of LineageOS I used was Evolution X on my Moms old OnePlus phone since it wasn't supported by the "official" Lineage version. Great track record of almost daily updates, and the customization you could do with it was phenomenal. The funny thing was I was running Ubuntu Touch on it before and it was super sluggish (totally not expecting that tbh) so switched to Evolution and suddenly the same phone was really snappy and the battery lasted for almost two days.

But yeah, I'm not surprised many installs are just branched versions of the original since many of them you can run on phones that aren't supported by the official version.