If it's destructive, then changing the relative position of a blade can improve efficiency. Accurate simulations also predict hot spots. Pinpointing these hot spots helps with the design of cooling conduits and blade coatings. Color corresponds to temperature. Such simulations pinpoint likely blade hot spots, which helps in the design of cooling conduits and blade coatings.
Time is no longer a problem.
Our only restriction is the number of processors. From my point of view, what I'm waiting for now is parallel systems with more processors. User developed code.