I think a lot of people feel like they need to baby their devices as if they’re Windows XP laptops from 20 years ago. The beauty of modern mobile operating systems is that they take care of things like battery performance for you. Capping your battery charge to 80% doesn’t improve longevity, it just means you never get to experience the full battery life of the phone you bought. https://www.macrumors.com/2024/09/24/iphone-80-percent-charging-test/