People keep misunderstanding what this 2-year warranty is. It's not a blanket 2-year warranty where if your product develops a fault the manufacturer has to fix it - it's a warranty against manufacturing defects and manufacturing defects only. And the onus of showing that something is a manufacturing defect is on the customer, sadly. So if you bought a macbook, and 1.5 years into the ownership the screen dies, apple is under no obligation to fix it, unless you can prove that it died because of a manufacturing defect.

To directly quote from the article you posted:

"But, after 6 months in most EU countries you need to prove that the defect already existed on receipt of the goods, for example, by showing that it is due to the poor quality of the materials used."