I never stop being impressed by these "<something-crazy> running Doom" posts. AFAIC, whenever we get to Mars, we won't truly have arrived until someone is playing Doom on Mars, and without wasting valuable resources by doing so. Running Doom, the canonical measurement of truly mastering a thing's capabilities.
I am still waiting someone to port Doom on CSS
Someone delivered that 2 years ago: https://codepen.io/cobra_winfrey/pen/oNOMRav
Oddly, it doesn't work on my browser (Firefox on Gnome).