All my /usr/local remained intact on upgrade. I believe this was the standard behavior with an upgrade install on previous OS X releases, and it got moved out

All my /usr/local remained intact on upgrade. I believe this was the standard behavior with an upgrade install on previous OS X releases, and it got moved out of the way when you did an "archive and install." I couldn't even find an option to archive and install on Lion, does it even exist? I would rather have done that and gotten rid of all the cruft I've accumulated.