Yeah, the TV's aren't perfect -I never expected to buy the perfect TV that would never age, or never loose any picture quality during it's lifetime. If such a TV existed they may as well close the R&D departments down right now.
And sure, maybe Panasonic made a small mistake with their voltage regulations in terms of how they match with plasma decay, -But I'll bet the vast majority of people getting upset about this have not, and probably never will notice the issue themselves. Talk about the power of suggestion.
Lastly, I'm not trying to defend Panasonics PR team or their business practices -that's a different topic anyway.