But I suspect whereas the static type additions to Python will tend to spread throughout your entire system (the more you annotate, the more useful the feature is), the dynamic features of static languages tend to be used in specific places for specific reasons (the less you use the feature and the more you encapsulate it so the dynamism doesn't "escape", the better it works with the program as a whole).
This was pretty much true when I was last using C#. You would find specific places where you need "an object" (e.g. maybe you want to LINQ over some data in a method) so you could dynamically create it but if you wanted that object to go anywhere outside of scope you had to have a concrete definition.
