@mhoye one reason the fixed, constant column width is something I'm curious about is that it would make right-justified (say, in a right-to-left language) look & feel just as normal as our left-justified, primarily written in English code does today.
A bunch of our tools have a lot of bias baked into them. Even the notion of "trailing whitespace" which is taken to mean "extra whitespace to the right of the last non-whitespace" and almost certainly isn't implemented in a right-to-left language neutral way.
So part of this is an exploration of the limits and biases of our software development tooling and common practices.
Enough infodumping for now. And also I think I did this to you several months back already :)