Glad I'm not always going through this.
If I get the 15PM I will hand my 13PM down to my wife, and her 12Pro down to my daughter, keeping her XS as a spare!
Same thing happens in my family. Devices always get handed down and as no one else has the same level of tech enthusiasm as me they are always very happy with this. It means I make no money back on devices, but keeps the family tech up to date and no stress with the selling options.