The Xbox codebase was pretty good. We were doing enforced code reviews back in 2011-ish, which was a big thing at the time. There was also a good layer cake going on and a few good architects.
The worst codebase by far was Outlook for Mac. It had code going back to Entourage, and was never properly cleaned up.
The worst codebase by far was Outlook for Mac. It had code going back to Entourage, and was never properly cleaned up.