Both OSes suspend apps in memory so there hasn’t been a need to manually close apps for years now. iOS has typically been better with this but Android phones have gobs of RAM so it kind of evens out. Anyway ya app no need to micromanage until lidat liao.
Pro Max battery is mad so yeah, stepping down to the Pro needs a bit of adjustment. It also comes down to personal usage habits, if you’re a heavy gamer the Pro battery won’t be much good for full-day usage. My kid uses the iPhone on weekends for gaming and I can see that really eats up the battery. I’m a light user, I personally don’t game on the phone although I heavily use Safari, Apollo and YouTube. Still have 60+% left over by the end of the workday. Removed FB and that really saves on battery.