Citing NASCAR is equally as relevant as the parking lot @ work.
NASCAR used 2-drs because they were lighter (plus they were available).
After circa 1980, it was merely tradition (hence the Taurus 2-dr).
Automakers need to condense the number of model lines and offer more body styles. It's fiscal madness to offer a dozen sedans each separated by a half foot in overall length.
There's simply no specific, quantifiable demand for so many steps on the ladder. Simplify the offerings and there's more room for more variants. The pick-up teams understand this completely.
Economics I agree play a part it is how they come to terms on what to cut.
If the coupe was in such high demand they would still build one for every model line. They are the model that pulled the short straw in production numbers and often they are the one that met the axe as buyers needs ands wants changed.
If there was enough demand and if they were bringin enough money in to show are sizable profit they would be built.
The demand for sedans are a global thing too. While there are couped offered they have become limited over the years elsewhere as they have here.
I never owned a car with 4 doors till 1997 with my SSEI..All I had before that either has 2 doors and some only had 2 seats. I take that back my first car was a 63 Galxie sedan. I bought it off an old lady for $500 and it still had the original exhaust on it. I hated the car as in High School everyone wanted to take my car because I could take 6-7 people in it easy.
Again the market has shifted no matter if it is the lower demand for coupes to the very low take rate on standard transmissions. Times change buyers expectations chane. Who in 1970 would have expected one of the strongest markets would be FWD/AWD small tall wagons called compact SUV's?
Today we have 4 door Prosches, Lambo has not given up on their sedan Jag is mostly sedans now and Aston makes a sedan. Even those who were nothing but coupes have moved out into the sedan market. Give credit to Ferrari as they are holding out but Fiat has already a Maserati sedan that out sells the coupe so they can get by with that.
What needs to be watched is the new Mustang as while the Pony car have evolved the new Mustang is going to see some radical changes in 2014. It may not be a sedan but I expect we will see things in this coupe not offered before in a Mustang to help with usability. Smaller engines with the same power and much less weight will also play into this. Retro on this car is out the door. It will remain to be seen how this will effect the cars appeal. If done well it may only expand sales as Ford expects. Again The markets are changing and for many the past holds little interest anyl onger. I am not a fan of many of the changes but I am only one small voice in a sea of others that have no issue with the changes.