Perhaps they can give your 'soon to be purchased' Audi V10 the milk float treatment.
That would obviously be sacrilege, but if your car has the engine from a canal boat or cement mixer then why not.
Worryingly, I find myself agreeing with you. Electric conversions are best when the car's original drivetrain is crap, like a Mini or anything else afflicted with an A-series. They're also well suited to the conversion; a small light car doesn't need a huge motor, which reduces the requirement for lots of batteries, and there's room in the rear subframe for those, it's already a good city car but a poor cruiser. The real problem is that a good conversion is expensive enough to exceed the value of the car. By a lot.
That isn't the case with converting an E-type or Aston, but the drivetrain is a major part of the appeal of the car and they aren't the worst aspect of owning one.