The numbers are just invented: Let's say Nissan is required to sell 2,000 BEVs per month. They barely make their quota. All of a sudden a tax credit of $7,500 disappears. They are still required to make their quota, so they will eat the loss, continue the same lease price to continue selling EVs, which is required to continue selling pollution cars.
That math is way too simple, and it doesn't factor in the Leaf being a car sold worldwide, not just in the US. Nissan won't eat $7500 on each 2018 Leaf. They can get ZEV credits from PHEVs as well. If the Federal credit gets killed, there will be a long period of stagnation in the EV market, as only the more affluent buy new EVs, and people of more modest means buy cars like the Prime, with the help of more modest state credits and rebates. Used EV prices will skyrocket. By the end of the year there will be serious discounting, but that's far too late for most people like me.
2013 "Brilliant Silver" SV with Premium and no QC, a 2009 Vectrix VX-1 W/18 Leaf modules, and 3 EZIP E-bicycles.
PLEASE don't PM me with Leaf questions. Just post in the topic that seems most appropriate.