I think the point here is that Nim should not be used as if it's Java, because
it's not. Even Java itself moved from Maps/Lists with Objects to generic types
in 1.5 (even though they are still awful because of type erasure).
In Nim, if you want a variable to be able to hold values of several different
types, you can use `object variants
<http://nim-lang.org/docs/manual.html#types-object-variants>`_. The case where
you actually want to put *any* type into a variable is exotic and most of the
time not the ideal solution for the problem at hand.
