I agree completely on the type system. When first starting with it, I was thinking "wow this is great, I don't have to worry about types and things just work".

I agree completely on the type system. When first starting with it, I was thinking "wow this is great, I don't have to worry about types and things just work". But then weird things start to happen, and you realize it's due to strange type issues that are sometimes harder than they should be to track down. And then half your code ends up being something like as.numeric(as.character(as.vector(xyz)))