It is not that the sedans are gone, they are being literally replaced right in front of our eyes. If you sit in a sedan or a coupe today you are treated to a near claustrophobic driving experience, I term it as I cant see SH*T. Why?
Safety regulations heavily applied to cars and not SUV's or light trucks- that's why.
These same regulations that do not apply to the SUV the same way which allows the loop hole production of so called "crossovers" which has nearly entirely replaced the market for cars in general.
The Manufacturers know well that the progressive media demonized the SUV in general starting about 15 years ago so they simply began making a version of the SUV based on an automobile chassis. In technical terms these vehicles are Mini SUV's, compact SUV's and mid size SUV's.
So you sit in a so called "crossover" you sit higher, you can usually see all around your vehicle and feel more in control of the driving situation and all wheel drive then makes the vehicle highly attractive.
So, If a Camaro was reborn as a sport crossover - sales would explode.
The end game is autonomous vehicles and ride sharing and the complete end of automobile ownership.
The transformation of the car from an extension of who you are socially to the branding of an appliance ownership experience is sadly nearly complete.
My 2 cents after getting opinions from people on the inside... just sayin'