The patterns book is 15 years old, that's about 150 in developer years.  All told, it's amazing that more of the patterns aren't out of date.  Here are some that I think could be safely retired.  Again, they're not necessarily bad ideas, it's just that they're special cases of more general principles, and I favour understanding the principles. Bridge I'll be honest, I'm not sure I get the point of the Bridge pattern.  A bridge is exemplified by the following example from finance: You have an interface for a traded instrument.  Call it IInstrument. Shares are one...