SD Rebel
Spends too much time on here
You said the reason why: positioning/marketing. There is nothing in the 6.4 itself that would make it cost prohibitive, GM does the 6.2 at a similar markup. But just because they don't, doesn't mean it can't be done if they want to.
Absolutely, but I suspect they don't want to. The position and marketing is done on purpose. They are selling plenty of RAMs at the moment, which is impressive since they now the oldest design, other than a few minor convenience & accessory updates, pretty much untouched since 2019, whereas the F150 was recently redesigned and the GM twins are getting a mid-cycle refresh and all new interior for 2022 model year.
Now Ford did offer the Raptor motor in the Limited F150 as an option, but again lower volume. Maybe RAM could do that with the 6.4L without getting too close to the TRX, like a Limited 6.4L, but again, it won't be affordable or volume model we would want. I would love to tick the box on a Rebel build sheet for a couple of grand more, but I just do see it based on what FCA/Stellantis is currently doing.
They are doing a refresh for 2023 model year, expect exterior and hopefully some powertrain options. Maybe they can throw us a bone with a 6.4L, but I suspect it will be more likely the I6 Turbo.