I think your memory of the 2 -> 2.1 -> 2.2 -> 2.3 (if you were lucky to get bundler running) to 3 to almost immediate 3.1 with massive changes (asset pipeline)

I think your memory of the 2 -> 2.1 -> 2.2 -> 2.3 (if you were lucky to get bundler running) to 3 to almost immediate 3.1 with massive changes (asset pipeline) upgrade is a little fuzzy. It was the suck. A lot of companies I know of are still running Rails 2 because of this change.