Sean T. Collins at The Outline explains the difference between Dune and the Extended Cinematic Universes of both television and film. There are no warring camps or whiney man babies upset that there’s a girl and a person of color leading many of these franchises. With Dune you just have nods and winks to lines and characters.
Dune references signal shared knowledge to those in the know, and that’s about it. Dune fandom is an un-fandom.
As soon as it becomes some sort of cash cow I think all bets are off. Pretty sure there’s a movie on the horizon. That should fix that.