In summary they noticed that their e2e suite mostly caught integration errors where clients and servers had incompatible schemas for the data exchange. The nov

In summary they noticed that their e2e suite mostly caught integration errors where clients and servers had incompatible schemas for the data exchange. The novelty is that they found a much faster way to identify this kind of errors by collecting and comparing the client and server side schemas statically without even running the code. This is a great optimisation, but it did not remove all defects so they still need to define tests that validate actual application behaviour against the business rules.