I'm also still on iterm2. I don't quite get what people want from a terminal emulator, for me it's mostly window management: being able to open iterm2 fullscreen with a hotkey, having panes and tabs, that's it.

I wouldn't even need panes and tabs if I used tmux, but I can't be arsed: I used to but now much prefer using a GUI and not have to do tabs/scroll/selection differently than every other application.