Ship modern JavaScript to save 54000 metric tons of CO2 & boost web performance

Very good point! Interestingly though that 350 KB is still smaller than the 441 KB average JavaScript for a site in 2020.

which is a pity for everyone calling themselves "web developers"

I agree, think you might like this that I've been making: https://ecoping.earth/indexes/gb/digitalagencies

Nit: 212kb, the rest is a YouTube embed that I seem to recall is loaded lazily.

To be clear: It doesn’t _require_ JS at all. The page _is_ static and works with JS disabled. It uses JS for YouTube, Login and the interactive widgets at the bottom.