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by kevindamm 740 days ago
It was a nightmare. Mostly because there were a lot of special cases (think of a Python2 appengine-classic having no upgrade path on some //third_party lib that the team needed to keep running anyway), and it's not just the 10^5-10^6 # of concurrent contributors to the codebase, it's 10+ years of contributions much of which were maintenance-mode projects, many of those had been inherited two or three times over.

There was a lot of cat-herding.