Not everyone is like him. Carrying spare batteries is probably the exception, not the rule. I literally can‘t think of anybody I know in real life who even owns

Not everyone is like him. Carrying spare batteries is probably the exception, not the rule. I literally can‘t think of anybody I know in real life who even owns a spare battery for their mobile phone. Apple probably figured that this was a feature worth ditching because hardly anybody needs it, maybe also because there are (clunky) workarounds (with all those external batteries). The iPods and later the iPhone have an active accessory ecosystem so Apple can do stuff like that.