Try my demo [1] on 3G slow. It works fine.

Turns out brotli compression does wonders.

[1] https://checkboxes.andersmurphy.com

on real 3g, seems to load in about 5s. As good as hackernews imho

Yup for initial load. But the subsequent interactions which each require a network hop and send down the whole page are lightening fast.

Because once that connection is primed you are off to the races.