Understanding the VT state machine and all its quirks and inconsistencies is not high up in my list of code I'd like to learn. It is good it is packaged up in a library and emacs is just a consumer of it.
libghostty will have excellent compatibility and features rather than an elisp implementation that maybe half baked.
I stopped living in the world of turtles all the way down. Now I'm more like, hey is this is good library ? Is it integrated well ? It does not matter if it is in zig, rust, c++, lisp, scheme, ...
Even 9front has something like 9p, namespaces and everything it's truly a file. Even GNU/Emacs under Hurd doesn't have its full power developed until the GNU people ditch Gnuplot for their own GNU-born capable 3D plotutils and the like.
And today given the speed of jitted Emacs if I were the Calc maintainer I'd try to write a PNG/farfbled (or whatever it's called) plotting tool in pure Elisp, with both TTY and graphical outputs.
Depending on non-GNU, external tools it's holding GNU and Elisp back.
- Purged are gnuplot dependencies with a custom and actual GNU bound 3d plotting software. GNU calc for Emacs should have been working with core Emacs libraries long ago.
- Plotutils extended for 3D should have been mandatory long ago
- GNU made Texinfo not be Texlive dependant for PDF/HTML output. Texinfo should have been standalone a la mandoc it's under Unix for PDF output.