https://oxide-console-preview.vercel.app
More details:
https://github.com/oxidecomputer/oxide.ts
Depending on the environment you're working in, it makes testing a lot easier. MSW isn't for everyone, but it can make things a lot more painless.
Last time I checked, testing libraries did not have custom iconset and a testimonial section to rival the Stripe homepage.
1. It's actually pretty easy to get a pretty site these days. The SaaS layout is so standardized you can just buy a template to get your React site up and running and looking professional for a couple hundred dollars and a few hours of work. The site overall definitely took more time than that.
2. This is a library for front-end developers. It's made by front-end developers who probably have some design skills of their own. That makes it easier for them than Linux's kernel hacker team to set up a nice website.
3. Is this just a matter of insecurity on your part? I'm sure you have plenty of dev skills but maybe they don't extend to UI and you don't like that this team can throw together a beautiful site for something that's merely a side-project?