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I had a P85D AP1 loaner when my P85 was in for 4 year service, the adaptive cruise would be great on trips, AP was a novelty but I wouldn't actually use it, fail to see the point if you need to have a hand on the wheel anyway. It is a critical step to FSD though.
Do you value autopilot or speed more.
S85 with AP. especially coming from a Prius.My brother in law currently drives a Prius so it doesn't take much to impress him
He does have a 40 plus mile commute so it probably makes sense for him to go AP.