By "nobody", he means JavaScript "hackers" (his term) and webdevs. How joyful that those types of "devs" are now excited and "care" about desktop and mobile development.

Limiting oneself to JavaScript is quite limiting. Just like a polyglot person is has access to way more information, cultures and fun than a monolingual one; a polyglot programmer too has access to more tools, paradigms and fun. Also, hammering everything as if all the stuff was nails is not hacking at all.

I guess he meant Indie developers. I am one. I didn't care, but do now.

Eh? Indie developers thrived on Mac ecosystem for years.

And also on Windows, and even on DOS, before Windows.

Googling terms like "shareware" and its history (not the only model, there were, of course, outright paid products too), will show some stories, maybe not a lot, since some of this was before the web, so not archived. But will show enough to get an idea. Jim Button was a classic example, but there were many other indie devs (many of them one-man shows), who may not have made it so big, but made good money from desktop apps.

Google term: shareware jim button

Edited to add:

http://asp-software.org/www/history/the-origin-of-shareware/

Ironically the Mac App Store itself is basically just a WebView in a window, and you're essentially browsing a website (DOM and JS and everything) with extra privileges with the host OS.

I don't see the irony there. And even if there's one, that's irrelevant anyways, the important thing is what's sold thru the app store.