Does anyone prefer the name dnf? I will likely never agree that it should have been renamed to dnf, even though it represents a significant amount of rewriting. yum is an incomparably better name. "dnf" is even worse than "apt".
DNF always makes me think of the fact that in racing, DNF stands for Did Not Finish.
yum wasn't renamed dnf -- dnf is a new, yum (mostly) command line compatible replacement.