A friend worked for GE Research a several years ago. They were focused on reliability engineering. Meaning have predictive reliability on a bell curve to avoid failure during the 3 year warranty period, and to have a rate of failure during the extended warranty period to preserve the margins.

The impact of surprises… bad components, variances in operational conditions, etc can have a big impact. Also, the quality improvements that emissions controls had on cars didn’t happen for white goods. Cars were hit with emissions AND safety standards, which raised prices.

For appliances instead they incentivize things like all electronic controls (more prone to failure with rough service or high heat), and undersizing components. Old appliances were all mechanical and easily fixed, the electronics tend to turnover quickly and are difficult or impossible to get from a 3rd party.