[slapresta]

While I understand the sentiment, this conflates up-front design with compile-time safety, and opposes the latter to "quick, spontaneous changes". However, I feel that my iteration loop gets tighter thanks to compile-time safety, since I don't even have to run my application and test it to find most of its errors.

[sanderjd]

Yes! It is so much easier to write a bunch of aspirational code when you know the compiler is going to tell you exactly why all of the stuff that can't possibly work won't work, so that you can go fix it.