[slobotron]

One could argue that if you are about to majorly break back compat, that you should just rename your project. Even calling it `foo2` is better than pretending it's `foo 2.0`. It may slow adoption of your new work, but at least it's staying honest.

[DougBTX]

SemVer doesn’t seem to distinguish between “major” and “minor” breaking changes, instead saying all breaking changes are major version changes. So making new major versions cheap seems like a good way to document any breaking changes, even if they are “minor” breaking changes.