Yeah, Archive&Install... what a great idea. The last time I tried it, the installation process halted right at the end. Right as if the installation was about to end, the whole thing stalled. Great! And did I create a backup of my system before doing this Archive&Install which is oh so great? No. I did not.
Could i have recovered from the whole ordeal by just shutting down my Mac whilst in the installation process? Probably. It was a thing that reminded me of how dealing with computers cannot be at a 100% succes-rate all the time.
Note: I do not normally choose Archive&Install - I wanted to save some time but ultimately have a fresh OS X install(because of me thinking my Mac wanted a clean slate)
I will be doing what I have done since 10.2->10.3->10.4: Manual backup procedure -> Clean Install.
maybe i'm just another victim of Murphy's Law. What can go wrong, will go wrong. 🙄