Hell, Eclipse STILL doesn't really have a nice dark mode. The actual editor view looks okay, but the dark mode feels very bolted-on to the surrounding UI.
I think this is the primary reason why VSCode is eating the world today. People will talk about the plugin ecosystem and all these other community inertia advantages. However, VSCode was exploding in popularity BEFORE that plugin ecosystem was in place! If we're really honest with ourselves, we flocked to because it was even more gorgeous looking than Sublime Edit, and without the nag modal to pay someone 70-something dollars.
Appearances MATTER.