It's a teletype terminal emulator, probably with pretty things and stuff. Who cares what language it is written in? Will writing it in Rust ensure that PF1-4 emulation will work properly?

You say that xxx is totally the wrong tool to use in the face of evidence that it might not be (Tabby is a tty emulator written in xxx). Why Rust and not Typescript?

I use a TTY rather a lot - konsole or Linux native and I can't really get too excited about what provides it these days. I recall discovering Gentoo back in around 2000 and the shell just looked lovely compared to all other distros. Do bear in mind that you have a shell running in your TTY. Nowadays I run Arch and its shell setup looks a lot better now than it did - strangely close to Gentoo.

#----------- I'm cough updating (repairing) my Arch laptop and sorting out a smart new Electron versioning snag (bye bye vscode for a while). Oh dear the CPU fan sounds rather Gentoo - I've been binging the AUR too much 8)

> Who cares what language it is written in?

My HP PC from 2015. Can’t afford something better atm.

One could discuss whether it really needs to be Rust. But TypeScript is definitely the wrong tool for the job.

The performance reference is xterm. If you cannot beat that, don't bother.