[thenonsequitur]

First, let me start by saying I'm a day-to-day Ruby developer and I absolutely love the language. That said, there are things besides the speed that prevent the acceptance of Ruby among people:

* No static type checking, potentially resulting in more bugs * Ease of monkey-patching, potentially resulting in insecurities * Rampant use of hash-as-arguments, resulting in method definitions that don't actually define their arguments (though Ruby 2.0 fixes this with named parameters, it's still a common pattern) * Heavy use of symbols, which some people see as the moral equivalent of magic strings

I personally think all of these arguments are bunk except for the over-use of hash-as-arguments even in Ruby 2.0. But some people give them credence.