Depends, if you are content-driven and can generate and cache static HTML and that's all you need I say hell yes, send that only, give it an e-tag, call it a day. ezpz. I gave benefit of the doubt to the author though and imagined an application that utilizes a decent amount of data that changes fairly frequently. In this case I can see the want for reducing the actual data sent over the wire and moving to a microservice infrastructure for the data with minimal logic server-side.