A feature that has been requested several times, which has never been attended to, and with no real arguments other than the amount of work. So my question is: why instead of working on any kind of theme related we get this awful buggy "time travel" bad joke theme that no one requested?
The most difficult aspect of having a Dark Theme is that you have to re-evaluate every color choice. Every color choice on every website (and their meta) individually. Notice that the retro page uses the same primary color scheme as the regular pages. It may use different font choices or whatever, but the colors are all the same.
So the degree of work needed for this joke relative to having a Dark Theme is at least an order of magnitude less.