Not sure where people are getting the idea that hard plastics = rattle and noise. It has no real bearing, rattles and noises are related to overall build quality and fit of interior. Plenty of cars with 'hard' plastics that have no rattles or squeaks as the build quality and fit and finish is very high, the Toyota Yaris is a good example someone mentioned earlier. Mate has an old mk1 diesel with 200k, interior looks 20k rather than 200k and there's not a single rattle or noise.
Likewise I have experienced premium cars with so called soft touch plastic that have rattled or had poor fit and finish, such as an Audi A4.
The construction of the interior parts plays a huge role, to stop rattles manufacturers use damping mechanism, for example a bit of cloth within clips to stop one plastic part that connects to another from rattling when idle or squeaking when going over a brick layed road.
They all use plastics, just some cover the plastic with another type of material to attain the softer or premium feeling.
A lot of cars simply trade on perceived quality and give the aura of being higher quality rather than actual real quality.
Also the definition of quality has become somewhat twisted and diluted, we are told having a soft rubbery feeling dashboard is quality whilst the rest of the car is constantly breaking or has poor design. Use of the general term of 'quality' should be aligned with the car as a whole rather than just its dashboard material!