It has been listed on the arch wiki under their list of available terminal emulators for a long time and I often use the wiki to look up things even when having to configure things on non-arch systems.
It's been meantioned on here a few times in conversation. That's how I stumbled across Kitty.
I wanted to try a new terminal, so I looked up the terminal latency comparison article that was making the rounds a few months ago. Of the ones that ran on OSX, Kitty seemed to be worth trying.