Please, oh please, FOR THE LOVE OF META! Use this as a 404:
I agree that the MSE 404 page remains bland, and while I do miss the waffles, I propose the following in their place:
There is also a slightly larger version. I am unable to determine the origin of this particular GIF for attribution.
I believe Beaker is worthy of carrying the waffle torch.
This is what the Russian Stack Overflow "oops page" is doing:
A kitty would be nice.