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The problem is that it is a trade-off between saving electricity and having equipment that last longer. Laptop tends to have a relatively short life-time, and when something (screen, keyboard...) stop functioning, it is not easy to replace this part, especially after the end of the warranty. So people tends to buy a whole new laptop. Building and getting rid of electronic devices have great environmental costs (how much pure water to make a processor).
A CRT screen is by far less convenient than a flat panel, but the latest is not nice at all when it comes to dismantling.