I think many are missing the point of track mode. It’s a focused software version for performance orientated models. It didn’t come until after the initial P model came out, true, but that doesn’t mean they didn’t pay for it. Track mode is a differentiator for performance buyers, and “nudges” perspective buyers who desire that into a more expensive model. If they offer it to everyone, then more people wouldn’t think the “nudge” isn't big enough and choose a less expensive model. If they offer it as an option, then things get overly complicated. Part of the reason I like Tesla is the simplicity. I miss the personalization options other companies give (looking at you Corvette and 911) but the differentiation between P and AWD is already slight enough. When you bought it is irrelevant to the business decision of which model to offer it on.