> There is more state, lot's of shared entities and unit tests are expensive to write and maintain. Good point, but only to an extent: Unit tests boilerplate i

> There is more state, lot's of shared entities and unit tests are expensive to write and maintain. Good point, but only to an extent: Unit tests boilerplate in dynamic languages that is redundant with static typing is only a (minor) subset of unit tests that you should be writing for your code. Static typing is not an excuse to skip unit tests altogether. I've unfortunately met people claiming exactly that...