I don't know the formal definition of Level 5 but I think of FSD as coming in two stages: The first I think could come within 5 years: This is where the car drives itself without human interaction most of the time, but there are conditions where it cannot, and it requires a driver to take over. If the human is not in the driver's seat the car pulls over and tells you to take over. If I have to drive some of the time, I want the critical information in front of me where it's easier to see. The second, which I don't expect sooner than 5 years (my time horizon for me to own my Model 3, before I upgrade to a newer car) is where there are no driver controls and I can take a nap in the back seat as the car drives me. Perhaps a bed is an option in this car. This car needs to be able to handle every possible condition on every possible kind of road. I think 5 years is overly optimistic for this.
I hope I'm wrong.
Okay, I found definitions. Level 4 the car is fully self driving within its own defined geographical area. Level 5 there's no steering wheel.
So I think there's going to be a Level 4.5 where the car can drive itself and is not limited to a geographical region, but where there are potentially situations that car cannot deal with and it stops and requires a human driver to take over.
I think Level 4.5 could arrive in five years. I do not think Level 5 (drive absolutely anywhere, under absolutely any conditions, and no steering wheel or other controls except an input device to tell it where you want to go.) will come that soon.
Again, I hope I'm wrong but my guess is 10 to 15 years before a car without driver controls is not geographically or otherwise limited. Until that time I want information directly in front of me.