Uber jar considered harmful?

I seem to recall a post in the not too distant past where is was at least
implied (if not outwardly stated) that the use of uber jars was an
anti-practice. Unfortunately I can't find it now and my google-fu is
failing me.

Am I making this up? Can anyone confirm my recollection?

Is there a best-practice recommendation re. uber jars that is generally
recognized in the Maven community?

Jeffrey E. (Jeff) Care
Advisory Software Engineer | IBM Watson Implementations Release
Engineering
carej [ at ] us.ibm.com | External: 919-543-4907 | Tie line: 441-4907