Well-written blog post about something I had never, ever, considered. Maybe one day this will come up and I'll remember that something like this is possible. The general trick of "rewrite the entire webpage based on some external API status" seems like an interesting and powerful (... and dangerous) tool.

In terms of achieving the overall goal of "greening" the web, I would be very interested to see even some back-of-the-envelope math explaining how much energy this technique saves and how much of an impact that would have. Understanding the energy cost of webpages and massive edge rewriting serverless platforms like Cloudflare is unintuitive to me.

Cynically, my impression is that the overall approach is more like "greenwashing" than "greening" — at best I would guess it "raises awareness", with all of the implications to efficacy that such actions usually have. I followed the links through from the blog to The Green Web Foundation's FAQ [0] and did not find any tangible estimates of energy impact nor any attempts at measuring such an impact. The success metrics [1] they list do not include any measure of energy saved or understanding of the potential to save energy; rather, basically just attention.

[0] https://www.thegreenwebfoundation.org/tools/grid-aware-websi...

[1] https://www.thegreenwebfoundation.org/tools/grid-aware-websi...