I’m upgrading from my 15 Pro Max 512GB Black Titanium to 17 Pro Max 512GB Silver.
The 15 PM has been an awesome device, so I can fully understand your lack of excitement as the 15 Pro Max was the Pro Max model that brought a lot of what we take from granted now in a Pro iPhone; from fast USB-C, a “Pro” chip with Ray Tracing support, Apple Intelligence (the oldest iPhone to get the update) + Visual Intelligence, 8GB RAM, longer zoom optics, etc…
Honestly you can buy a 15 Pro Max today and feel pretty up to date as the 16 PM did not move the needle really.
Really up to you.
Personally I have enjoyed the 15 PM but I am excited for the new iPhone design, definitely keen for the bigger screen and bigger battery along with the new Camera setup with all sensors now being 48MP and the upgrade to 12GB RAM tells me Apple has a lot in-store for the 17 PM, whenever Apple upgrades RAM on a Pro Phone I know it’s time to upgrade, lol.
I am also beginning to notice some heating up again (something that I used to experience in early iOS 17 versions), though not as much as the early days, I do get the feeling iOS 26 seems to require a bit more out of these chips, so I am keen to see how much more of a difference the Aluminium body + Vapour Chamber will do in 17 PM as both the aluminium and vapour chamber will give the 17 PM a significantly higher thermal ceiling than 15 PM and 16 PM.