If there were that many preexisting orders they wouldn’t need to cancel it. Look at the chart in post 23, some of this stuff will still be getting made for a year. That’s just crappy management doing a bad job of filly a supply chain they don’t need and now have to burn through.
Some of that "STUFF" as you call it are parts which will be used for stockpiling then made available to dealerships when customers like you bring in your discontinued XYZ vehicle that needs a new transmission or whatever.........
I've worked in the Detroit auto industry my entire life and have found that the vast majority of people whose only knowledge of vehicles is what they buy and drive.
Every vehicle on the road today, when first introduced, took about 8 years from concept to full production. And every vehicle has a calculated life cycle which is contingent on buyer demand. As long as the demand continues, the auto company will continue to produce the car with additional changes and add on's to keep up with their competitor.
Once the demand for a specific style starts to wane, the auto companies shift their attention to the type of vehicle the public is more inclined to buy.
I'll use my own car for example, which is a 2016 Ford Focus. Ford has announce they will discontinue the Focus and the Fusion and other passenger cars with 2018 being the last years manufactured.
There was no out cry here when those articles were posted........
Check out this article from this past April..........
https://www.nbcnews.com/business/autos/ford-stop-making-all-passenger-cars-except-mustang-n869256