I don't have any interest in yucking anyone's yum, but for me, I find working in and IDE to be vastly more productive than trying to remember dozens of vim and tmux shortcuts.
I haven't personally tried the CC extension because like you, I concluded that it sounds like a single-company Cursor with way fewer points of integration into the IDE.
I hate bikeshedding and rarely do I switch tooling unless something is demonstrably better; preferably 10x better. For me, the Cursor IDE experience is easily 10x better than copying and pasting from ChatGPT, which is why I created this thread in the first place.