This is the same argument that gets brought up for every language feature. I remember the days when lambdas were controversial. Lambdas used to be seen as crazy complicated magic that normal programmers wouldn't be able to understand, or would abuse to make code unreadable, or would make a language unnecessarily complicated. This side of the argument eventually loses. People get used to new language features and as it turns out they are not as complicated as people initially think. At the end of the day it's nice to be able to write a generic collection.