The whole issue is that WP like it or not got a whole lot of people to trust that they knew more than they did about their own product and told them " Do this now, it is OK, It's us at WP" every time they logged into admin.
Kind of like the commercial going on now where they guy asks the two 5 year old little girls if they want a pony. The ones say yes, and he hands that one a plastic one and then he asks the other one if she wants one, and of course she says yes, then he makes a click, click noise and out walks a real pony.
The other little girl looks at him and he says, well you did not ask for a real pony, like it was her fault not knowing the exact right question to ask. Then something along the lines, even children know when something is not fair or something like that.
I am not saying anyone associated with WP is evil like that and I am sure that they are probably really good guys and gals. They have to be to put out a great product like WP.
But them mentality of trying to blame the people that trusted WP to put out a product that was safe, is probably part of what caused the issue in the first place.
Programmers as whole, are usually terrible at practical issues when it comes to the people that actually have to use their product. I know, I have had them working for me for over two decades. If you ever want to find out the why and the what, go read a book called "People Pattern Power" if you really want to understand the psychology behind it.
That being said, again, with about a days worth of programming, they can come up with a script that backs ups the version they are using, and be able to go back to it no questions asked. This is not all that hard. Besides you have some really bright people working on this project.
The bottom line is the 2.8 is hosed, and they should do something about it ASAP and take the auto upgrade down until things are truly fixed.
And most importantly they need to give people that have had their sites put out of commission because they trusted WP, a fix to go back to 2.7.1 as easily as WP gave them an option to break their site in the first place by saying "Do this now, it is OK, It's us at WP".
This is unarguably the right thing to do, even if 2.8 is the greatest thing since sliced white bread. It will make WP even that much better.
We will have to see if someone steps up to the plate on this one or not. I really hope that they do. Stay tuned I guess.