This article complains that downloading stuff is slow and then goes on to propose a solution where you have to wait for stuff to download before firing a scroll handler.
But if you can hydrate granularity, and prefetch smartly (based on visibility, analytics, etc) things speed up a lot.
If done right, there is no delay on interaction, and a lot less time and resources required to load a page, increasing lighthouse scores and TI specifically
Thats what we’ve seen in the field too, the FAQs in the article link to some real world examples. Tho I can’t say our prefetching is as smart yet in practice as we want, so sometimes there is a delay on very first interaction. There is a straightforward way to improve this tho that we are working on