After using iTerm2 as my daily driver for like a decade, and then trying out some of these other "fast" terminal emulators, I was amazed at how slow the experience in iTerm2 is. I even kept alacritty around as a second terminal for a while for cases when not having iTerm2 features wasn't a deal breaker, but eventually I just went back to iTerm2. I am still aware of how slow it is, and although I tolerate it, I wish it were as fast as some of the others.

You can see the speed difference with your eyes by joining a tmux session from different terminal emulators and doing operations that redraw the whole terminal, such as searching in a less pipe.