Good points. I started with ClojureScript earlier this year and I agree with your article. But for me ClojureScript is still much better option than staying in JavaScript land. Performance will be solved over time with faster machines (I've purchased high-end iMac recently, so I don't feel such pain :-). Workflows for incremental compilation like Figwheel also help a lot. And I think there is a great promise that tooling will evolve quickly.