You can still do the same thing on modern windows. Alternative shells were a thing for quite a while. See https://en.wikipedia.org/wiki/List_of_alternative_shells_for... for a list. Unfortunately people don't seem to be that interested anymore and the options that remain are Cairo https://cairoshell.com/ and blackbox.

But in theory: It's as customisable as you want. You "just" need to write it. The linked 3.11 project is not just a customisation - it's a whole shell just like Cairo.