If you don't care about native UI widgets (I and many others only use the terminal part of the UI, so I don't) I don't really see a reason to use Ghostty over Kitty.
This process is documented with systemd, but it's not a requirement, a plain xsessionrc could work similarly: https://ghostty.org/docs/linux/systemd
Why? Do you open a new browser window when you want to visit a website?
Same with terminal. My terminals (xfce4-terminal or kitty -1) both open so instantly that I can ctrl+alt+t and even while typing at high speeds, the next character is entered into the terminal.
I can type the below sequence of keys at high speed (realistic example that OCRs clipboard image):
ctrl+alt+t vpng | ocr | ctxt alt+tab
without risking the startup time swallowing my `vp` keysAnd yes, I disable animations for any kind of window switching mechanism including alt-tab/worksapce switch
At any rate, I believe ghostty has the same single instance mode equivalent.
ghostty +new-windowNow, Monstar has a bizarre issue (at least in my setup) where it displays blank instead of capital A when used with Fixedsys Excelsior, for some reason. But hey it starts in under 10ms.
edit:typo