Passage Summary: An appliance dealer argues that since every secret update to a machine is an improvement, customers shouldn't be annoyed that they can't tell exactly which version they are buying.

Conclusion: Buyers do not have a valid reason to complain about manufacturers changing appliance designs without updating the model names.

Reasoning: Every modification made to these appliances is a change for the better that provides a benefit to the consumer.

Analysis: The dealer is assuming that 'improvement' is the only metric a consumer cares about, ignoring the value of predictability and information. To weaken this, we should look for a scenario where a 'better' version of an appliance still creates a headache for the buyer. For instance, if the 'improved' version no longer fits the standard replacement parts or has different dimensions than the original, the consumer has a very legitimate reason to object to the lack of a new model name. The dealer's 'benefit' might actually be a hidden burden.