Instead of making sites that try to predict the unpredictable, I'd rather ask the question if TCP is still the right tool to use.

There shouldn't be a reason for a big page with many resources to not load - it should just be slower. Yet I can make the same observations as soon as my mobile signal drops to EDGE: the internet is essentially unusable as soon as there's packet loss involved and the roundtrip-times increase. Interestingly mosh often still works beautifully in such scenarios. So instead of focusing on HTTP2 or AMP (and other hacks) to make the net faster for the best-case scenario, I'd rather see improvements to make it work much more reliably in less than perfect conditions. Maybe it's time for TCP2 with sane(r) defaults for our current needs.