

DB is the definite proof that German efficiency is a lie, but tourists using urban transports in big cities will usually have a good experience. Even the public transports in Berlin have got their shit together in the last few years, even if S-Bahn/DB are still a level below BVG.
Currently it works just as frontend for git, but it theoretically supports other backends too. Allegedly Google has their own experimental internal cloud+db based backend for big monorepos.