Reliabilty, handling, economy - The list goes on.
I beleive even clarkson himself said that "50mph in a convertible feels like 150mph, so what is the point of having a convertible that actually does 150?"
He also called it a full english sportscar (akin to ordering bacon eggs sausage and beans in Japan and still calling it a full english breakfast)
I have been in one that has had some real work done to it (1.8 tubby) and I'm 99.9% certain most hairdressers would cack themselves if they drove it. (or were in it when my lunatic mate gave it some)