The law you linked to doesn't make any distinction between tech products and other products, so I'm not really sure what you're getting at at this point. It's clear that there is no 4-6 year warranty. There are other protections which are lesser and quite open to interpretation. It's definitely good to let people know about these protections and they are indeed useful, but they are not a warranty. The period of 'coverage' has nothing to do with the 4-6 year period mentioned in 105 (which is the limitation period for breach of contract), but rather the subjective interpretation of how long a 'reasonable person' would expect a given product to keep working without fault.