Other than that, I think it's delightfully ugly and lightweight.
Having to separately configure individual sites or web apps for dark mode is a nonstarter anyway; if you could do that, would you really want to?
Ideally, you should be able to set your device to dark mode, and everything would follow: every app, every site in the browser.
Some combination of setting your OS to dark mode and using a dark mode extension in the browser sort of approximates that, imperfectly.
We still need the workaround via extensions or Userstyles for the ones that don't implement that, sadly.
[0] https://developer.mozilla.org/en-US/docs/Web/CSS/@media/pref...
Also, HN apps tend to make it harder to send interesting things to Roam or the laptop or Safari's reading list, the website makes that really convenient.