In some cases, it just serves as a reminder about Stallman's incredible stubbornness. (transient-mark-mode, for one) The defaults are easy to change, at least.
Also, not to feed the trolls, but it seems like with Emacs vs. vim arguments, people are usually talking past each other. In general, it sounds like Emacs users are happy to have an easily extensible environment, and the vim users enjoy using such a terse and efficient text editor.
There's nothing contradictory there!
An editor could do both, there just hasn't been a sufficiently popular synthesis of their strong points, yet. (Right?)