For me it’s also about decluttering the UI (for want of a better term). Dark mode lets the UI get out of the way, especially if the actual workspace or content

For me it’s also about decluttering the UI (for want of a better term). Dark mode lets the UI get out of the way, especially if the actual workspace or content remains light. The MacOS mail client is a decent enough example - you can have dark UI but still render the email as light on dark.