WHY IS THERE STILL NO DARK MODE? don't you care what users are asking for?

there is an actual response. The team is aware of the demand, though will not follow on it. I reckon there are not enough requests to it be viable.

https://community.miro.com/ideas/dark-mode-night-mode-874

I build CardBoard (another whiteboard) and just shipped this, toolbars and menus included. Most of the work was keeping selection outlines and connectors readable on any background. Notes here if useful: https://cardboardit.com/blog/dark-mode/