> Pixel kernels are now only offered as history-stripped tarballs, available privately on request, with no device trees, HALs, or configs. Thanks to projects like CalyxOS, Pixels will likely remain well supported, but they’re no longer guaranteed “day one” devices for LineageOS.

https://lineageos.org/Changelog-30/

Changelog 30 - Sleek Sixteen, Streamlined Suite, Future Flow

23 is prime

> Google no longer pushes monthly tags and patches to AOSP; and most fixes/security patches are now pushed quarterly, if at all.