I have a suspicion that they couldn't change it for now even if they wanted to. There are articles claiming that the 5th and 6th (current) generation were alrea

I have a suspicion that they couldn't change it for now even if they wanted to. There are articles claiming that the 5th and 6th (current) generation were already under development under Jobs. If it is so, then the 7th and 8th generations have also been in the pipeline for years now. Assuming Jobs presided over the trend for thinness, and the ID team continued that direction after his death, if they even listen to people become more vocal about thinness vs. battery life since 2014, they could have it influence the design of maybe the 8th or 9th generation. Remember that at those scales you don't have to just redesign a phone, you have to redesign supply chains, processes, fabrication methods and machines.