Gaming consoles are a different breed since they are usually subsidized by the manufacturer. The PS4 was sold below the bill of materials cost at launch (which is waaaay lower than the manufactured unit cost) and remained relevant for 7 years and will continue working for many more. Meanwhile the iPhones that were sold at a premium in the same year are now landfill. You can't convert game consoles into general computing devices without shaking the business model of that industry.