Name a single thing you used to be able to do on Mac OS X that you can't do anymore on Mac OS X.
Download the compiler toolchain without "registering".
Xcode and all dev tools used to be free to all - bundled on the OS media as an optional install, or a free download. Now it's only available to "registered developers."
Yes, it's a token bar to get over, but this more than anything is indicative of the problem with Apple's new mindset. OS X used to be an inviting place for anyone to create programs, they're now taking the first steps towards closing it off. "App Stores" are the next example of this - by creating a curated and "authorized" distribution channel, you cast suspicion on any other method of software distribution.
This bothers me, not because I can't get over the bar, but because I don't want to live a software ecosystem where only "professionals" need apply. The end result of this is what we see in the iOS app store: trivial utilities that would have been open or gratis on any other platform are instead nickle-and-dime, or else free but invasive to your privacy trying to be ad-supported.