Marco,
All your points may be true, but you miss my point. You’d think Apple would get better as they get older, and I have gone through major OS upgrades from OS 6 through 10. And NEVER in any of these stages have I seen this kind of failure.
I am a loyal customer who has come to expect that Apple figures this kind of shit out before they release a new OS or app. I could put up with a 1-5% hiccup as you mentioned, but not this kind of total failure.