I worked at Orbitz as one of the very first users of Graphite, and yes Orbitz was the first corporate user of it, and it was used heavily in production as far b

I worked at Orbitz as one of the very first users of Graphite, and yes Orbitz was the first corporate user of it, and it was used heavily in production as far back as say 2008. Graphite is (or at least was then) production ready. It does have documentation but it doesn't need much.