I think it depends to some on the nature of the warranty program. A lot of warranties are limited in scope (e.g., only on defects in worksmanship) and some companies just replace the item, especially if it is low-cost. However, other warranties are more comprehensive and the companies are actually repairing items to keep them in service. This contributes to the BIFL-ness of a product especially if it means that there will be parts or (paid) repair service available even after the warranty period is up or if you’re buying it second hand.