What if we used environment.etc."profile.d/vte.sh" as originally proposed? Would not that behave as expected?

I could, but there's not much of a difference either way?

Why did we refuse it in the first place?

I think I choose not too simply because there was no precedent for it in nixpkgs.
And the implementation matches that the options are specific to each shell.

In the initial post, it was proposed without much explanation why it is better #40878 (comment)

Won’t we need the same for zsh?

In the initial post, it was proposed without much explanation why it is better #40878 (comment)

Right, think it's because it's "global" but these very options operate on files in /etc

Won’t we need the same for zsh?

I'd check, but it looks like that module orders things differently.

I'd check, but it looks like that module orders things differently.

Checked, setting things in promptInit for zsh didn't appear to be overridden.