But is it right that the issue is fetching resources from a different domain than the current one? As a user, just because I've connected to domain A, it doesn'

But is it right that the issue is fetching resources from a different domain than the current one? As a user, just because I've connected to domain A, it doesn't mean I necessarily want my computer to connect to any domain B that A links to. Also, I'd rather developers focus on making small pages that are easier to fetch on demand, and am worried that they'll use prefetch to justify bloated pages. If a page is large enough to need prefetch, then I might not want to spend the data pre-fetching it especially if the click probability is not very high. Between all of these, I'm not convinced of the need for cross-domain prefetch. Apologies that I'm not a front-end person so this may be naive, but it would be great to hear your thoughts!