Sorry,
you said performance. Am I missing something in that sentance?
Yes I think you are missing something. If all cars were made for practicality, we would be driving in hybrids, electrics, smart cars, or all using public transport, for reasons of cost and safety.
We do not enjoy cars because they are practical, but for many other reasons.
I'm really confused as to how you are missing the point.
Super, style, and performance cars are so impractical, we are lucky to such an extent that they exist whatsoever, and are available for us to buy or modify providing we have the money and time.
And note that I made sure I included 'In my opinion'.
However ridiculous and impractical a car has been modified by it's owner, if you look at the car and if for even a split second the car makes you laugh or smile, the tuner has succeeded.
Exhibit A
It all depends on the owners personal intentions and interests.