My humble opinion as an IT professional.
Full self driving that most of us think of, as in doing work or reading while the car drives, is a long way off. Traffic, like weather is a chaotic system and the basic tenants of chaos are unpredictable and inconsistent. Right now you cant code or build an algorithm for that kind of chaos. Even AI and machine learning are really just buzzwords to be honest, and they have existed for decades, nothing new.
I'm not of the opinion a true FSD ecosystem can coexist with standard people driven cars, bikes, motorcycles, and pedestrians safely and efficiently. For true FSD you would need a network where all other cars knew about each other and nothing else can impinge on the FSD roadway.
Again - just my opinion. Flame suit on!