It is worth mentioning that their open-sourced driver is not the same codebase as their proprietary driver, it is inferior in performance for desktop/gaming use

It is worth mentioning that their open-sourced driver is not the same codebase as their proprietary driver, it is inferior in performance for desktop/gaming users. So it is not really a complete alternative yet. Either way as you mention, the fact it's only GeForce RTX 20-series and newer is a dealbreaker for people with older cards as well.