I've been using VitePress for a while now. I'm building everything on https://containersonaws.com/pattern/ via VitePress and an entirely custom theme. It feels great to be able to design the website using proper Vue components, compared to the quasi-template language of something like Hugo. And the page load and navigation performance has been quite nice in my opinion.
The only downside that I will mention is that builds are quite slow. I'm not sure how this will scale out as I get more pages. My Hugo website can build 100's of pages in under a second, while VitePress is taking 30-40 seconds to build around 100 pages.