Re: (2); Jobs' letter came two months before Adobe finally managed to launch a preview version of Flash for Android — three years of bickering, when doing so would have been a major PR coup, and Adobe still hadn't managed to produce anything. That says as much about the death of Flash as anything. It clearly wasn't ready when mobile devices came of age. Jobs couldn't have had it if he'd wanted it.
The letter was score settling for the atrocious Mac implementation though, I'm sure.