I always thought the same thing. If they had released a 6.4L in the TRX body, along side the TRX in 2021, I think they would've sold a ton of them. I certainly would have purchased on of them.
Would have been a nice option for the RHO to have a 392. Would be a little slower than the HO since its 485hp and heavier, but would sound excellent. Maybe they will have this as an option in 2027.
I think the RHO would have higher sales bringing in the guys that hate inline 6 but the TRX is a little out of their budget.