I had ~10 years of iTerm2 muscle memory which stopped me switching for ages. I also liked the half-screen dropdown terminals from iTerm that Ghostty doesn't have .
But I switched due some iTerm2 bugs and performance reasons (I'm usually running up to ~100 terminal panes, split across 4-5 windows and up to 9 tabs per window) and it was much easier than I expected. I got used to my hotkeys bringing up full-screen quick terminals instead of half screen ones and that's actually usually what I want anyway, and iterm just feels more hackable in general; my agents are able to help get input to and from the various panes quite easily, and I haven't had a single bug or crash so far.
But I switched due some iTerm2 bugs and performance reasons (I'm usually running up to ~100 terminal panes, split across 4-5 windows and up to 9 tabs per window) and it was much easier than I expected. I got used to my hotkeys bringing up full-screen quick terminals instead of half screen ones and that's actually usually what I want anyway, and iterm just feels more hackable in general; my agents are able to help get input to and from the various panes quite easily, and I haven't had a single bug or crash so far.