I don't use stuff like NerdTree (I used to, but ended up not liking it), and mostly just stick to the features that come with it. As such, I can be very productive without much configuration at all, which is much of the reason I used vim in the first place.
I don't want another spin of vim because I lose one of its biggest benefits: ubiquity. The further I deviate from the base configuration, the less useful having vim available everywhere is.