How to resist the urge to upgrade?

I have been fighting the urge to upgrade to s25ultra. I read the reviews, and it's pretty much the same phone, and it feels dumb paying more for almost the same. At the same time I kinda wanted, then I have to tell myself that just because you can buy something you don't have to buy it.....

Edit: i couldn't resist. I went to Best Buy to check the s25 ultra, and it was love at first sight. It feels good in your hands, very snnapy. I came home, I ordered!!