Dad is 65 and I'm 35. Every year I come to visit my parents, dad seems to know less about how computers work. He has used MS-DOS, Norton Utilities and every Windows version since Windows 3.0, yet here I am, explaining to him how a tree view in a file browser works. Such a tree view existed in the File Manager in Windows 3.x, in Norton Commander and in TREE.EXE for MS-DOS, but he has forgotten about them all, together with what he did or said 15 minutes ago. It feels like he's aging fast.
2) He has rejected smartphones. They are useless to him. He continues to use a camcorder and a DSLR when he wants to document special occasions, but not for reasons of technical quality. He owns expensive gear but has lost the level of interest that would warrant it. The simple point and shoot interface of a smartphone would be more than sufficient for him.