I have 12.5. maybe 12.6 is better but I've heard that before.
Don't get me wrong without a concerted data team building maps a priori, this is pretty incredible. But from a pure performance standpoint it's a shaky product.
The latest version is 12.5.6, I think he got confused by the .6 at the end. If you think that's bad then there isn't a better version available. However it is a dramatic improvement over 12.3, don't know how much you tested on it.
You're right, thanks. One of the biggest updates in 12.5.6 is transitioning the highway Autopilot to FSD. If he has 12.5.4 then it may still be using the old non-FSD Autopilot on highways which would explain why he hasn't noticed improvement there; there hasn't been any until 12.5.6.
Don't get me wrong without a concerted data team building maps a priori, this is pretty incredible. But from a pure performance standpoint it's a shaky product.