Build quality variance determines whether your oven survives 15 years or fails at seven

https://www.scribd.com/document/1071051142/Thermostat-Failures-Drive-the-Most-Repair-Calls-but-the-50-Rule-Determines-Whether-You-Should-Fix-or-Replace-219534

Oven replacement timing depends far more on brand reliability and construction quality than on a fixed timeline