Is support planned for CSS media queries, namely dark mode? https://drafts.csswg.org/mediaqueries-5/#prefers-color-scheme is the specification, and https://developer.mozilla.org/en-US/docs/Web/CSS/@media/prefers-color-scheme has some nice examples (although ironically doesn’t actually support it themselves).
Phabricator already supports a dark mode (Settings > Display Preferences > Accessibility > Dark Mode) but it doesn’t work very well. There’s very little customer interest in this mode, it doesn’t work well now, it’s a relatively high-cost feature to maintain, so it’s likely that it will be removed in a future version of the software.
it’s likely that it will be removed in a future version
According to the JetBrains last developer survey, 83% of devs use dark mode in their editors. I’m one of them, and only just discovered that Phabricator has a dark mode. It’s not great, but it’s good enough and I’d be disappointed if it was removed.