My take on this is: 1. The OO model of C++ and Java (the languages the author has experience with) is not the only model of OO around. 2. State has to be main

My take on this is: 1. The OO model of C++ and Java (the languages the author has experience with) is not the only model of OO around. 2. State has to be maintained somewhere in the program. While functional languages encourage minimizing state, nothing prevents the programmer from doing the same in an OO language. 3. Modeling is hard, regardless of the PL.