Im skeptical of all the benefits of the approach promoted here.

* not everyone has “two codebases” many people have one codebase and two different application distributions, one for server and one for client.

* you will still have “two codebases” you have just removed the rendering logic from you client codebase.

* What is the distribution of latencies of rendering json into html on the client? Are there numbers to suggest this takes more than 100ms for many people? If not the proposed efficiency advantages are being overstated.

If the article were suggesting removing client side logic completely these arguments would be stronger.