What's so difficult to understand about the fact that new products don't last as much as they used to? Back in the days the production and design processes were not as advanced as today, so a lot of margin of error was needed to produce equipment that worked the way it needed.
Today, there are a lot of different price categories for a lot of goods. So to give the people what they really want (cheap stuff), the components that are used in today's products are mostly the cheap ones that are produced without big margins of error for reliability purposes. This obviously means that they won't last forever, but boy are they cheap! Why should someone buy a very expensive TV that's garanteed to work for 50 years when in 15 years time there would be new models with a lot of new functionality anyway?
Sometimes I don't understand why some people are saying that that old equipment was so much better because it lasted forever, but I think the explanation to that is so simple.