I started using this last week to refactor a pile of legacy Ruby code. Gemsets per app is a godsend for that. You can disentangle the giant set of installed gem

I started using this last week to refactor a pile of legacy Ruby code. Gemsets per app is a godsend for that. You can disentangle the giant set of installed gems on your machine, figure out which ones are actual dependencies and which ones are only there because they were part of some crazy experiment six months ago, which ones are only there because they are dependencies of some other gem...