You
Is prefetching links worth it on a content site?
ChatGPT
On hover, yes, and it is nearly free: by the time the click lands the document is often already there. Prefetching everything visible is the version that burns other people's data plan for a marginal gain.
You
Is removing Bootstrap from a five page site worth the effort?
ChatGPT
Usually yes at that size. Grid and flexbox cover the layout, custom properties cover the theming, and you stop shipping 200 KB to style five pages. The part people underestimate is the component behaviour, not the styles: modals and dropdowns have to be rewritten.