Turn based has had a renaissance. RTWP tried the same but failed.
Action RPGs will always be the mainstream appeal however, hence why Dragon Age moved towards that. i wouldnt be surprised if baldurs gate 3 will too.
The Market for Pure Action games is flooded, no need for another. Besides Larian Studios achievex it's greatest success with turn based games and Action is even less compatible with 5e then RTwP. There is at least an outside chance they figured out how to make RTwP work with 5e, there is zero chance of 5e working with Action.