On Monday, 2 February 2015 at 16:56:56 UTC, ponce wrote:
A => B => C v1.2.3 A => D => C v1.3.6Even if C v1.2.3 and v1.3.6 are API-compatible, you can't build A if you don't control both B and C.So, version ranges are necessary for an ecosystem of libraries.
Erratum: if you don't control both B and D*
