I agree regarding the rant. I want an explanation of why I no longer need those constructs in Scala, not just a hand-wavy "they're bad, stop using them". Curren

I agree regarding the rant. I want an explanation of why I no longer need those constructs in Scala, not just a hand-wavy "they're bad, stop using them". Currently I need them, telling me that I do not is not going to sway me to your cause!