[JdeBP]

If you want another rabbit hole with respect to supporting attributes, consider that the Windows Terminal people are considering adding ECMA-48 standards conformance that no other terminal emulator has, the various graphic renditions from ECMA-48:1991 that no-one else has implemented in 30 years. (I saw the issue and added overline, framed, and encircled to my terminal emulator's framebuffer front-end. It will be in version 1.41 of the toolset, but that is not out yet.)

* https://github.com/microsoft/terminal/issues/6000

* https://github.com/microsoft/terminal/issues/6205

It brought me up short to be described as caring about KVTs. (-: I've mooted doing VTs in application mode code for a couple of decades, now. Here's a white paper from 2006, which was several years in.

* http://jdebp.uk./Proposals/linux-console-daemon.html

I must update that test script for Windows Terminal.