Rich Hickey's "Simple Made Easy" presentation at Strange Loop, recommended to me by my Clojure programming co-worker Hugh Cayless, is flat out awesome. "Guardrail Programming" and "Knitted Castle" are my new favorite metaphors. Hickey has a compelling theory about complexity and after watching the presentation, I feel like I can be a better advocate for simplicity. Advocate to those who like theory, at least. For others, the proof remains in the pudding, whether simple means better software.
REST, the architectural style, didn't factor into Hickey's talk at all, but is a great example of an approach that chooses simplicity over ease. REST is hard. It is. You're wrong if you've been thinking that REST is easier than SOAP or COM. Look at almost any (there are exceptions, yes) so called "REST API" and you'll see something produced by web programmers that tried to apply the REST style and either couldn't get their heads around it or gave up on it under pressure to deliver. REST is hard to understand and it can be difficult to explain its benefits to managers and customers that prioritize ease over simplicity. REST is hard, but REST is simple. It is predictable and you can reason about what you can or cannot do with it.
There's a notion in the humanities that DH (digital humanities) is undertheorized. I'm not a humanist, really, just a programmer, but I strongly disagree. Programmers in the humanities are doing a great amount of theoretical work. As well as reading Hugh's recent posts, digital humanities theorists owe themselves a look at Hickey's theory of complexity and Roy Fielding's theory of representational state transfer. The world of programming and the field of humanities programming and computer are more theorized than they appears to non-programmers.