My limited experience thus far is that annealing did not improve accuracy or standard deviation enough to make a difference. Most people agree that it extends case life, but I have not put enough reloads on any brass yet to have experienced that.
So far, I have only annealed using the salt-bath method, but I have on order an Annie Annealer, an inductive type. I’ve gotten into reforming brass, and I figure the inductive annealer will make the whole process easy enough that I am more likely to do it on a regular basis.