Mostly the default availability and native stability and compatibility with very Mac OS X and macOS release so far. I don't really need the terminal emulator to

Mostly the default availability and native stability and compatibility with very Mac OS X and macOS release so far. I don't really need the terminal emulator to do much (i.e. I don't need to have it integrate with tmux or screen, do things with the prompt or 'react' to what's happening in the shell. While I have a couple of personal devices where I could go and customise everything as much as I like, it wouldn't port over to anyone I work with or any system I write software for, or any presentation I give, documentation I write etc. Being more portable gives be better results overall than being specifically tailored to my preferences. I do default to light foreground and dark background colours wherever I go, but that is supported everywhere as far as I know, and has been the default on many platforms for long enough. (that said, I sometimes consult for complex/crazy situations and whenever you spot an xterm with black-on-white you know it's pain 'o clock).