> However, Ruby is about 10 years old now, Python and its insertion is  
> even older.
> If it would be so superior, didn't you think it would have been  
> widely accepted in the mean time?
> And would have been spread over to other scripting languages already?

You might.  And you'd be right.  Python is widely accepted.  Python,  
by every indication I'm aware of, is more popular than Ruby.  TIOBE  
lists Python is slightly more than twice as popular as Ruby (http://www.tiobe.com/index.php/content/paperinfo/tpci/index.html 
).   And arguably, excluding any discussion of indentation, Ruby is a  
better language.  I'm told that at Google they won't even  let you  
code in Ruby.   They only allow a limited number of popular languages,  
which includes Python but not Ruby.