I 100% love and appreciate this effort.

I do think it's a legitimate concern to ask how this applies to larger web sites, however it's undeniable that mobile web users have been left in the dust as developers create ever-richer web experiences full of autoplay videos, crowded home pages, tracking pixels and more.

What is needed on the web is a comprehensive approach to performance, with contributions at the WP Core level, theme level, plugin level, JS framework level, browser level, hosting and more. You can have a perfectly performing site and add one plugin that slows it to a crawl, and 99.9% of site authors lack the skills to figure out what's going on - if they even notice, since perhaps they primarily use a desktop computer to manage their site.

So yes, perhaps by itself this theme can't do _everything_ you need to ensure the best possible performance for your site - but imagine a world in which theme authors, plugin authors and others ALSO made optimisations like this.

All those new web denizens on Android Go devices with 3G connections would thank you, since the web would go from totally unusable to delightful.