Will take a look, but 'history-search-backward' fills most of my needs in that regard.
You really should. Once I got use to the fish auto-complete history, the Bash reverse search felt terribly primitive. There is no Ctrl+R. Just type part of an old command and hit the up arrow to scroll.
If you're a die-hard bash user, autosuggestions are the feature most likely to pique your interest and make the command line more pleasant.