Earlier quoted context omitted.
"Loads faster" is fluff? How so?
Write some straight HTML pages and serve it from bog standard Apache. Heck, get really fancy and do some server-side includes for your CSS or something. It's really fast, you can edit it with Notepad, and you can probably saturate your bandwidth with a consumer level PC. It's fluff because, well, our expectations are so unbelievably low. By the time you've bolted on every whizbang dingus leveraging four different lan…
As for build time, I don't have a clue - I haven't used astro (and don't plan to. Datastar + whatever backend framework you want is better). But I'm generally in favour of the direction they're bringing JS frameworks.