It strikes me as grossly unfair that an airline can switch the plane and thereby adversely effect the quality of the product, without paying compensation. I cannot think of any other industry that would be able to get away with that.

Having said that however, i guess if I were originally booked on a 777 and the plane was changed to an A380 I would not be happy if asked to pay extra for the better quality product

p.s. well at least stewardess is better than trolley dolly