i absolutely hate how the modern web just fails to load if one has javascript turned off. i, as a user, should be able to switch off javascript and have the site work exactly as it does with javascript turned on. it’s not a hard concept, people.
but you ask candidates to explain “graceful degradation” and they’ll sit and look at you with a blank stare.
I hate “dark mode” so much
Don’t default to it as it makes the page hard to read and ugly. If you want make it optional that is fine but don’t force it.