Good article and I wish this was much better known.

The issue is though that it's too focused on interactivity. In reality, 90%++ of slow sites are not slow because of interactivity really, they are slow because they ship enormous react/nextjs bundles and have extremely heavy hydration work to do.

_so many_ sites have bundles >10MB that need to be downloaded, parsed and hydrated.

I've even seen (many) sites which have multiple SPAs stacked inside of them.

If you're on a slow internet connection and/or CPU the page is basically unusable for many tens of seconds and no amount of yielding post bundle hydrate will really solve that.

I challenge you to browse the web one week on this laptop part of the current top 10 Amazon best sellers on a gigabit fiber connection and tell me if you still think that this is the problem: https://www.amazon.com/HP-Everyday-Processor-Microsoft-Porta...