Totally agree, and I think that's what's going on with Angular. Bumping the major version for a set of modules also communicates that you really should be usin

Totally agree, and I think that's what's going on with Angular. Bumping the major version for a set of modules also communicates that you really should be using 4.x of all these modules together rather than mixing and matching with 2.x, even if some subset of them are technically backwards compatible.