I upgraded first to iOS 9.0.2, then to 9.1 today.
I haven’t upgraded my MacBook Pro to El Capitan yet. But, I think I will do it soon, as the first bug fix release is out.
And if anyone thinks I’m an Apple bigot, I’m running a Windows 8.1 VM on my MacBook Pro. I also have a Windows 7 desktop with about a half dozen Linux VM’s on it.
Computers are like tools to me. I use whatever is the right one for the job