Typically these things used to take 5-7years to "trickle down" where a reasonably-priced car (not that $80k is reasonable) might have these available for end users.
However Tesla absolutely NEEDS to do more to prevent this technology push model that they have from tainting the whole Autonomous Driving trend. Expecting that a Driver will read the f'ing manual about
"....Traffic-aware cruise control may not brake/decelerate for stationary vehicles, especially in situations when you are driving over 50 mph (80 km/h) ....Depending on TrafficAware Cruise Control to avoid a collision can result in serious injury or death."
is insane.
My suggestion: Enforce a must watch video tutorial with questions (such as is common for say a driving test) before enabling the Partial AutoDrive. It really is a matter of Life or Death - you have a very short time to react on the road. With their distribution model Tesla definately has the resources to pull this off, and might serve as a model for the rest of the industry.