Well I hate gatekeeper.
Iosification is in some ways good - for example, remember that apple's first implementation of airplay mirroring all started with the iPad 2, and then the iPhone 4s and iPod touch 5 - and then there was mountain lion bringing it to the mac. So that iosification of os x was good.
But what is this nonsense of iOS devices once on iOS 6, then upgraded to iOS 7 then not being able to go back to iOS 6? Do I want apple to impose this nonsense on my mac too? Nope! In fact I don't want them imposing it on my iOS devices either!
I have an old mac on which I had mountain lion, upgraded to mavericks and found it to be buggy, so went back to mountain lion - because I chose to exercise my freedom to do so. A freedom I want continued indefinitely thank you very much apple.
So apple, don't you dare remove that freedom and iosify my macs in this ridiculous way please.
So back to gatekeeper. It isn't just the iOS system updates method and restrictions that I hate, but also restrictions to apps that can be installed. Now we know why apple do it in iOS don't we? They get their 30% and don't like jailbreaking. But people still do it. I have an old iPad I jailbroke and can play the original donkey kong on it and run Mac OS System 7. Nintendo and apple don't like me doing that, but too bad. It's my iPad, not apple's. I'll do what I want with it thank you very much apple!
So if apple dare to stop me installing whatever I want on my mac the same way they stop you doing it on iOS devices, we may well begin to see a new jailbreaking community set up for macs. That would be terrible if we have to go down this path.