I'm not the GP, but I did use Kitty, then switched to Ghostty. There were some great features (e.g. a shorcut to load the current terminal content in a text editor), some arguable points (e.g. Python is Kitty's script language and I had to use it to configure tabs to my taste) and some annoyances (I've had various crashes with Kitty's Debian package, though it did get stable in later years).

For me, the major pain was font rendering. I could not find a portable configuration that would work with any screen. And even worse, for some pixel densities, whatever configuration I tried, the result was awful. In some cases, I vaguely remember there was a legacy mode that made text legible, but it had its own problems.