The suggestion has been brought up and dang has commented on it over the years. He doesn't seem opposed to it per se. It's possible your descendants may live to see dark-mode HN:

https://news.ycombinator.com/item?id=23199062

See also:

dang + "dark mode": https://hn.algolia.com/?dateRange=all&page=0&prefix=true&que...

dang + "on the list" (lol): https://hn.algolia.com/?dateRange=all&page=0&prefix=true&que...