Lots can go wrong unpredictably or fail over time but that is not the same as the way a chemical battery degrades (roughly) linearly. If I let my car sit for 5

Lots can go wrong unpredictably or fail over time but that is not the same as the way a chemical battery degrades (roughly) linearly. If I let my car sit for 5 years my experience is you can’t really predict what needs to be relaced (besides wear items like tires, battery etc).