Linux already relies on specialized tools - like Cocinelle=spatch - to migrate very large codebases at once. Linux has also grown from a hobbyist project into a

Linux already relies on specialized tools - like Cocinelle=spatch - to migrate very large codebases at once. Linux has also grown from a hobbyist project into a fairly complex (informal!) organization of highly-skilled full-time developers, just to keep development manageable.