Popular libraries/frameworks that have been around for years and have hundreds of real engineers contributing, documenting issues, and fixing bugs are pretty much guaranteed to have code that is orders of magnitude better than something that can contain subtle bugs and that they will have to maintain themselves if something breaks.
In this very same post, the user mentions building a component library called Astrobits. Following the link they posted for the library’s website, we find that the goal is to have a "neo-brutalist" pixelated 8-bit look using Astro as the main frontend framework.
This goal would be easily accomplished by just using a library like ShadCN, which also supports Astro[1], and has you install components by vendoring their fully accessibility-optimized components into your own codebase. They could then change the styles to match the desired look.
Even better, they could simply use the existing 8-bit styled ShadCN components[2] that already follow their UI design goal.
[1] - https://ui.shadcn.com/docs/installation/astro [2] - https://www.8bitcn.com/