while there are few takers for a convertible, the fact that Merc's SLKs, SLRs, RR DHC and the likes are selling shows that there is a market for such cars
Specially for those who want to arrive in style - Drive to the destination with the top up, and roll down before you enter !
On a serious note, the well heeled can surely afford to keep some gorgeous drop tops, in their hill station getaways, for the wind-in-the-hair motoring. Give practicality a pass.
cheers!