So many theories but its SO simple, FCA management messed up big time!
Whoever made the call about estimating demand should be looking for a new job.
Did the dealers add to this, of course!
It's SO simple really........ really is!!
I'm not a marketing genius but holy crap its so easy to estimate.
Lets look at GM and Ford numbers.
Chevy sells 90k of all flavors of the Camaro, of that 8k yr ZL1
Ford sells about 80k of mustangs of that about 7k GT500 650hp when they made them...

FCA sells about 50K challengers, hmmm........how many Hellcats will we sell?. Highest HP in the market .....DUH....not 2500!!!. BTW your fired!
4500+
And yes, of course the FCA order system CAN stop taking orders when it hits a certain number, even a monkey could code that in 10min!