As someone who did a similar swap Pixel 6 Pro to 15 Pro Max, and my first time off android Hope you enjoy it. I do miss the customization but at the same time i did a lot less customization than i did back in the older android days. The stability of the general phone things has been alot better, bluetooth, mobile data and reception has been a big improvement. The thing that really pushed me over is the device values, my P6P isnt worth putting a new battery in a iphone bought at the same time can have a battery replaced for $69 and will be worth about double the pixel equivalent.