It's not so much allowing debt, it's that the barrier to entry is extremely low. You can hack around and get a feature "working" without having a great understa

It's not so much allowing debt, it's that the barrier to entry is extremely low. You can hack around and get a feature "working" without having a great understanding of what you're actually doing. Statically typed languages will confront you with a lot of obscure errors and just generally get in the way. Eventually the good developers will eventually learn the language and get burnt by float32 / sql injection / xss / dates / not validating input and they'll learn enough to become extremely productive. Static languages have evolved a lot; now the standard error messages are far better and the tooling is amazing. At the same time a lot of dynamic features - usually reflection based - have come along and provided their own breed of arcane and nutty rules and errors which seem designed to catch out only the strongest developers (the ones which break SOLID are the best!).