While constantly replacing your devices for the newest generation is arguable more of a want than a need, sometimes it is caused by unavoidable failures. So called "planned obsolescence" is when companies create their devices to last around three years, so that the warranty is expired and there is a newer, shinier, better version available. It isn't in the best interests of companies to have long lasting products that never need to be replaced, due to both rapid technological improvement and money, and it isn't in the best interests of the environment to have companies negligent of their environmental impacts in favor of profit.
https://www.bbc.com/future/article/2016 … ce-of-tech