Migrating source code systems is intense. It's very much a superlinear scaling question - the more people involved, the more training, the more chance for error

Migrating source code systems is intense. It's very much a superlinear scaling question - the more people involved, the more training, the more chance for errors, the more miscommunications, the more tooling needed. Where I work, we've been doing some migrating from ClearCase to Mercurial. Pretty intense work.