I think any question posed under “warranty” as compared to “failure” misses the mark. All failures are not warranty issues but most warranty issues are failures, time dependent and subject to the ACL.
Another aspect, but how can it be quantified? An increasing number of manufacturers only stock spares for the warranty period at product end-of-life. Since there are still some sales for a time after that, if a failure cannot be fixed because of insufficient spares they have the option of replacing with a “like product.” So no part is not a worry for them.
For us, eg our Asko washer, designed for 20-years service as the advertising goes, looked and worked as new but had the control board fail at 12 years. As with anything electronic in the modern world, the module was designed to be replaced not repaired. But no part available - out of production and out of stock. Asko suggested we try 3rd party parts suppliers and used machine vendors to scavenge the part.
We did not replace it with another “quality” Asko! Why pay top dollar for a product that might last 20-years, or only 12, when one can buy a product that is rated very highly for what it does that might last 12 years or maybe longer if lucky, or perhaps just 6, but for half the price?
