I know that Ruby's metaprogramming facilities don't equal Lisp's, but does that matter in practice? i.e. is there a convincing number of metaprogramming use cas

I know that Ruby's metaprogramming facilities don't equal Lisp's, but does that matter in practice? i.e. is there a convincing number of metaprogramming use cases that can be implemented using Lisp macros, but can't be implemented using the Ruby meta object protocol?