I think you missed something. You CAN force the system to ignore the BIOS and use the power management feature by setting a kernel flag. How does that qualify as a horror story? I used to build computers on "screaming new hardware" and newly purchased laptops. And I had to go through the pains of figuring out what the flags were by researching. Not once did I BOTHER with attempting to get the manufacturer to FIX the problem for me. Unless I'm a developer interested in updating the BIOS, I just care that the computer I want is doing what it should be. E.g. Figuring out how to install Bumblebee so I can run Optimus.
Also, to use the newer hardware, I would simply go to a store and bring my live Linux CD with me. Either it ran or it didn't. If it ran, I bought it. If it didn't, I skipped it. Time is money. I have none to do a manufacturer's homework.
You want to stick it to them. Don't buy the thing that doesn't run what you want.
Apologies if I am oversimplifying, but I do not see "I bought hardware and the manufacturer won't let me run what I want on it" is a horror story. The real horror story to me is that you bought it without checking to see if it was a lemon. We don't have a lemon law for computers when it comes to Windows vs Linux. Caveat emptor.