I think it is safe to say we all want our cars to perform. If that includes the AC system performing on a hot day....so be it. No, I am not going to buy a Prius Dane.
The parts rolling out to market these days are getting better all the time. And seem to be leaning in the direction of serious street and track performance. But there will always be a big difference between a dedicated track car and the components used to build it and a "traditional" PT car. But the line between them is getting more and more fuzzy every year (from a strictly performance standpoint). Meaning, the PT cars are posting better lap times, higher skid pad numbers, shorter stopping distances. But as they do this they lose the "street" comfort and daily driver ease of use.
So how far do you take it before you turn it into a track car?