[Unsimplified]

The cost of a product is not only replacement price but also replacement time. Replacing with an alternative is more cost than an identical. High-quality long-life products have excellent value efficiency. The key to online review info is convenient centralized interfaces and accurate-trustable reviews. Curation is the future.

[gillesjacobs]

It would be a great feature to log replacement time and adjust life-time price as a product property.