Comment by jajuuka

Phones with unlock able boot loaders still exist. Samsung phones outside the US that use Exynos, Pixel, OnePlus, Motorola, etc. The features people made custom rom's for have just become part of Google Android or part of other OEM versions. Even though these popular phones do have unlock able boot loaders there just isn't a large interest in custom rom's. The interest in custom roms and more locked boatloaders happened in parallel.