> Good luck with purity. Most of your counter example needs integration tests to test properly anyhow - not really a good point. If you can give up encapsulat

> Good luck with purity. Most of your counter example needs integration tests to test properly anyhow - not really a good point. If you can give up encapsulation (which IMO isn't actually that useful in practice) and in return, your program becomes 95% functional, that seems like a really good tradeoff.