I've worked on many bikes that were just left sitting around for years and almost never have they "just worked".
Di2, on the other hand, warns you several hundred miles before the battery dies and once it gets low enough it will disable the FD but keep the RD working to get you home. It is less likely to leave you stranded than a broken cable. Or the multiple times my ever simple and loved by retrogrouches downtube shifters loosened up and left me stuck in my highest gear in the back. But I'm sure I imagined that.
Last edited by Nerull; 05-21-13 at 04:15 PM.