They have sold fewer Wagoneers and Grand Wagoneers since inception that Ram sells 1500s in a quarter. I don't know what the take rate is in the I6 vs V8 for them, but the sample size of non-fleet owners is tiny.
That said, the issues deadlining 2025 Rams aren't engine related. Who knows what that looks like in 3-5 years, but right now it doesn't seem to matter if it's I6, V6, V8, or a kangaroo on methamphetamines with a trampoline under the hood. Atlantis is what's causing all the major concerns.
*edit* fun fact: The four letter commonly used shorthand for methamphetamines is censored here, but the full word isn't. Because reasons.