Adam F.
Really appreciate the nice words - its motivating :-) My comment was not to you, but to Shane and Neolukas "fanboy" and "apologist". Uh, no.
I do agree that Apple needs to look at failures - whether of install scripts, ref data comparability, or corruption - there are too many.
My main points are: 1) normally it DOES work 2) dealing with ref data corruption had fixed many issues (contacts, mail) and 3) other evidence notwithstanding, i have a safari window with an embedded youtube video. When i start the video, a flash process picks up in activity monitor, When i pause it, it falls. hmmmmm.
I'll share a personal problem. Yep, my 3rd upgrade had an issue - contacts vanished and it crashed regularly. So.... i deleted the ref data and preferences, got my backup (never upgrade without protection!), imported it, and voila! all was well.
To my point - there was no "el cap" incompatibility- my previous tow upgrades went smoothly. I guessed that there was some data conversion that went awry, and guessed right. I'll note that that was also the case with a third party mail utility i use - its preferneces were corrupt.
Hence my frustration when folks say "safari doesn't work with El Cap". The main problem with this, aside from being factually wrong, is that it doesn't lead you to a solution very well. It may be fun to bash Apple, but that and $3.75 gets you a cup'o Starbucks.
Note what i said about Flash. I would assume they used HTML5 too, but i have evidence to the contrary....that i admit i don't know the details of.
G