Much prefer astro.

It's somewhat counterintuitive, but the added complexity leads to simpler projects that are easier to maintain long term. I have simple markdown files, and a separate, code-based conversion process that works well for me.

Also the documentation for eleventy was always confusing to me. I almost got the impression that "it's so simple, we don't have to explain it". Whereas astro's documentation is much more accesible; there were a handful of cases where there was something I wanted to do and astro had an example of exactly that. I didn't have to do guesswork, just follow the examples in the way the creators intended. Stuff like that is important.