I first tested Astro on my site and never went back. Now every new project defaults to Astro and I have to have a reason not to use it. So far no reasons. It's simple, fast and it kinda fits my desire to keep things minimal. For example, yes, page content matters, but all but one page on my site is under 10kb, most hovering in the 3-4kb range (100% of the downloadable content)