Earlier quoted context omitted.
I came to say that too. If anything, it keeps decreasing - the first app-capable iOS devices had no app store, and the barrier to entry for programming on either system keeps dropping (the SDKs and even the IDEs are free, for instance). The only claim I can see is the emergence of the OSX App Store - big shocker there, given the success on iOS - but that hasn't resulted in a lockdown of regular installs, and I doubt…
Many reasons: Apple clearly sees iOS and its locked-down environment as the future and Mac OS X as the past. Given that, we can conclude that the overall openness of Apple's offerings will decrease as they focus their efforts on iOS. Xcode is for-pay now, while it was free earlier. Apple keeps breaking SIMBL. Debuggers now need to be signed by Apple or self-signed; either way, it's a pain. QuickTime X is no longer ex…
It's back to being free if you have installed Lion.
>> Apple keeps breaking SIMBL.
SIMBL is a non-standard 3rd party framework. It would be more correct to say that SIMBL isn't keeping up with OS X development.