[unpolloloco]

This is a clear example of regulation making cars more complex! In the 70s, there were no crumple zones, airbags, backup cameras, traction control, lighting intensity requirements, or a whole host of other things that are mandated today. Those things do cost money.

That said, this is also a clear shift in consumer demand too - a 1970s $3500 car is going to be a sedan, small, and pretty featureless. Compare that to a $20k Corolla today - which is the same proportion of median income that the $3500 car was in the 70s. It's larger, more reliable, safer, and has a whole bunch more features.