i think in the long run, having to maintain a code that is readable helps a lot. even though c++ itself is easy to follow, it starts to get complicated once you get deeper and deeper in oo where everything is inherited from something else. this is one thing i like in python modules. they are highly readable. and then write something in Cython if its time critical. same with Go, the code feels very clean and easy to maintain. i haven't done parametric polymorphism in c++, so no idea about it.