Not sure the enjoyment wears off if you go to the track, but it gives you a new perspective on how long it takes to brake from 120 and between not wanting to go to jail or be part of a mega accident on the freeway, I don't really speed on the streets. Now cloverleafs are a different story
If you want to talk about restraint, hop on a sportbike. :O That was truly hard to keep at legal speeds. M Coupe and M5 are easy.