If you're a large hosting provider like a Google or a Microsoft or an Amazon or a CloudFlare, you want to be eco. You want to be eco for PR reasons, for financial reasons, and for practical engineering reasons.

Slow scripting languages don't make you eco.

You have to think bigger.

Yes, let's save the electrons so we can mine bitcoin with them. /s

oh, oh, wait - I have an idea! Let's just write everything in 8-bit assembly language, that will let us really optimize and save all the electrons for bitcoin mining! /s

You really are barking up the wrong tree. Going after Javascript as if it's the reason the planet is doomed, or even makes any difference at all in the grand scheme of things, is just looney tunes crazy. Sorry, it just is.

Some people just have no ambition.

I stopped using semicolons in my code to support your cause. Think of all the power it will save by not switching on a few pixels! We'll save the world! /s