But there's a lot more CSS features now. While in the past, Turing completeness in CSS required humans to click on checkboxes, now CSS can emulate an entire CPU without JavaScript or requiring user interaction.[1] So I wonder if DOOM could be purely CSS too, in real time.
[0]: https://keithclark.co.uk/labs/css-fps/ [1]: https://lyra.horse/x86css/