The TypeScript playground is kind of amazing for being some bits of JavaScript hosted on some site. There aren't a whole lot of apps that couldn't be run in a browser.

I guess it comes down to ownership.  If your bits are in someone else's cloud, I could see how that might cause concern for people that buy DVDs or have terabytes of stuff that most likely doesn't belong to them in the first place.

And the browser is a good target for progressive enhancement-- something that hasn't taken off on the native end of software development.