I thought his point about the burden of having to choose a code editor was, well, not a good point. I mean, a Clojure source file is text. Open it in a frickin text editor and edit away! That technique is easy and has been working fine for decades now. Go with what you know: vi, TextMate, whatever. You don't truly need syntax highlighting or an IDE when you're just dipping your toe into the water. The bigger issue you have is learning the language and start slinging the code and seeing what happens. And that can be done just fine with a REPL and text editor.
Most of the other points were, at best, just pointing out things you'd expect with a new language and new ecosystem. It takes time to polish things.
I guess this is some kind of modern cultural issue. I think, people have no "native" editor. They began to develop language X in IDE Y in their university. Now they shall develop language Z.
Someone like you goes "well, so what? I got trusty vi here. It might not be the ideal tool for the job, but it will work until I find something better". Others will go: Oh. I cannot use Y here. So, I need to finde another tool to develop Z. And since I have always used IDEs, this MUST be an IDE of course.
Most of the other points were, at best, just pointing out things you'd expect with a new language and new ecosystem. It takes time to polish things.