Republicans in other red states don't quite have the amount of challenge the NCGOP has. Swing states like Ohio, PA, Michigan, and Wisconsin have incompetents running the State Dem parties who pose no threat, while in blue states the GOP has no latitude to be really bad (when they are, like Bruce Rauner in IL, they are instantly castigated).
Texas GOP will become like the NCGOP in 10 years when they're starting to see the state of the state shift beneath their feet. Much more vicious and defensive of their historical power.