One thing that's not too clear to me is if it's possible to use existing UI libraries. For example, to install Vue's Quasar component library I need to run

    import { createApp } from 'vue'
    import { Quasar } from 'quasar'
    app = createApp()
    app.use(Quasar)

But since astro abstracts away the root Vue application, I don't see how this is possible anymore.

Astro might make sense for a blog where you don't need a full blown component library but for any other web application, I'm skeptical of its capabilities.