> If you find yourself writing large amounts of custom 
  > code in Rails, then either you are truly tackling a 
  > novel problem that no one has ever dealt with before,
  > or you are simply unaware of the gem that you should
  > be using.

Sounds like Perl - or any other mature language, though I have never seen one with that many libraries for anything I could think about.

The language that has the libraries I need is always the one I end up using.