Can confirm that the multitasking is a huge boon. When I was shopping for my current phone (Android; previously iOS), I figured multitasking would be something kind of gimmicky that I never really used on a screen as small as a phone, but I can tell you that I use it all the time. For me I mostly use it when watching a YouTube video and needing to respond to a text. I can keep the video playing on the top of the screen while I respond below. Apple clearly has the software to do this as we have seen in the iPad -- why won't they decided to their phones? Not even their behemoth Xs Max?
I would agree that split screen/multitasking would be nice to have. Whenever I switch from my iPad to my iPhone I immediately miss that ability. iPhone and iOS are plenty capable.