It really depends on what phone you had and how old it was when you switched. Most of my friends are very surprised when I mention that my Android phone lasts

It really depends on what phone you had and how old it was when you switched. Most of my friends are very surprised when I mention that my Android phone lasts more than 2 days on a single charge; their iPhone barely lasts a day. If they switched they'd come to the same realisation as you did but with phones reversed. If they upgraded to the latest iPhone I am sure they'd also be pleasantly surprised. I think something that has happened in the last 2-3 years is that the average phone has gone from 'full day battery' on purchase to '2-3 day battery' and there has not really been much marketing around that fact (or at least as far as I can see), so people on older models don't quite realise what they're missing (and are of course also suffering from battery degradation).