There is a difference between warranties and guarantees - the FE explained it a while back.
There have been some changes regarding anticipated life span for various products and up to six years has been mentioned, but it's not in the way or at the level that many people presume. See:
It would be, for instance, completely unreal for anyone buying a £30 microwave, £35 DVD player or £59 portable TV to expect up to six years' use trouble-free.
If products are built down to a price then you get what you pay for. In fact I understand that Asda, which used to give a three-year guarantee with much of its very cheap electrical products, has dropped the scheme.
That's probably because, as I'm given to understand again, it has a warehouse packed full of cheap electrical goods returned by customers for replacement or refund.