Very annoying as well
Devalues a brand.
Takes around 10 years a cycle but
Executive style car, big saloon, eg Granada, Omega, Volvo 7xx 9xx, big roomy cars (these get dropped)
Normal car, Mondeo, Vectra coathook, and so on (these bloat to similar sizes as above but are more ordinary)
Family hatch (Scrote, Focus, Ashtray), these grow into normal size
Small car, Fiesta, Corsa etc, these are now as big as family hatches.
New car to replace small car, eg Ka, Opel Adam (anyone notice they are getting bigger, Opel is bigger than a Nova already)
In 20 years the big cars will be grown up from the current family hatches,