From their manifesto [0] https://www.sustainablewebmanifesto.com/

> Efficient

> The products and services we provide will use the least amount of energy and material resources possible.

Ha! Let's see how much impact this has on the current web industry.

Development velocity vs efficiency.

I've yet to see a shop avoid Tower of Babel stacks that increase the former, at the expense of the latter. Unless it's a backwards-compatible drop-in upgrade. And even then, it doesn't bubble high on the priority list.

[0] Obligatory https://m.youtube.com/watch?v=BwozkbmjzC4