That's not that development has gotten easier, it's that the bar has gotten far higher. The fact that e.g. responsive UIs and multiple input methods and the lik

That's not that development has gotten easier, it's that the bar has gotten far higher. The fact that e.g. responsive UIs and multiple input methods and the like are possible is a consequence of the fact that development is so much easier you can afford to spend resources on such things. What you're citing is an example of the Jevons paradox, not a counterexample. Development got easier, so demand for (more depth and variety of) development rose.