While I am not going to make a case for
@MrRom92, as he has been the most vocal about the issues he has experienced, I will say that I have seen iOS operate very differently across three different devices. My company-supplied phone has very few apps. I use it mostly for email, MFA, and a few other things. I have only a few apps loaded on it. That phone has excellent battery life, no issues with resprings or even redraws of icons. My personal phone, which has a dual SIM, a TON of apps loaded on it, and which I use most throughout the day, has seen redraws, messaging issues, keyboard lag, and a few others. No resprings. My iPad acts much like my company phone—except it, too, has a lot of apps, a lot more downloaded content, and is set up similarly to my personal phone—but no redraws, resprings, etc.
My point is, we all use our phones differently, with differences in which apps we use, how many, and all of that, and despite what some may say or argue, this impacts how the phone behaves. I do not blame iOS for all of these issues. I think some of this is caused by the apps we install. Don't tell me I am wrong - show me. Prove that this is not possible and maybe I will think differently, but with three different Apple devices all running the same software but different results, its hard to believe that something in there does not affect how our devices act.