I guess at least a few of the prospective HD Ram owners forgot what was planned by FCA before February of this year, it had been in the works for months.
In early 2017, The last Administration was making deals with FCA, Ford & GM
The deal was that that the US Automakers would move all their factories back to the USA, the Gov't made the deal worth while.
All 3 auto makers were reconstructing a good portion of their closed down plants.
I may be mistaken & i am not going to look everything up, unless i have to.
FCA moved the Jeep Plant, they almost completely rebuilt the Sterling Heights Assembly Plant & changed it from a Car Plant to a 5th Generation Ram assembly plant, the car plant was moved to another location.
One of the next steps was to refurbish the Warren Assembly Plant, piece by piece, with a major change to the Paint area.
Once the refurbishing was done, the plan was to move the Saltillo Mexico HD Ram plant into the Warren Michigan facility & then there would be no more 4th Gen Ram 1500s.
At that point, something happened, it may have been the sale of the company to Stellantis ??
So they stopped that part of the plan & it worked out, because so many customers loved the 4th Gen 1500s that they are still selling more 4th Gen Rams, then they are sell 5th Gens
So for now, the Heavy Duty Rams will continue to be built in Mexico
That works for Stellantis, because they don't need to design more stamps for the presses.
https://www.youtube.com/watch?v=D8QSpZoYGys