Sony literally bricked my PS1&2 compatible PS3 with an update and offered me something like a $20 gift certificate for Sony products for my troubles. I haven't bought anything Sony since.
The real issue is that courts hesitate to turn the screws on the companies that get caught doing this. If Sony was forced to pay 5x original cost in penalties, the cost-benefit analysis wouldn't have been in their favor.
I am today about to replace my Android because I can no longer update because the install gets bigger every year and I have run out of space. I am seriously considering going to a flip phone and using a small laptop or something else linux powered for my previous smart phone usage.