Developer experience(DX) was one of the prime motivators for Web APIs in response to SOA. Now companies such as Apiary are focused on enhancing this experience and improving developer productivity by taking a page from the SOA book around automation through tooling. Jakub Nesetril explains the nuances of what constitutes good DX and how Web APIs need to be designed and implemented in this context.
Debate sprang up at JAOO '07 around Bob Martin's assertion that "nowadays it is irresponsible for a developer to ship a line of code he has not executed in a unit test." In this InfoQ video, he debated with Jim Coplien on this and other topics, including Design by Contract vs. TDD and how much up-front architecture is needed to keep a system consistent with the business domain model.