To be fair there’s only so many times a movie about a group of retirees going to vegas one last time can be made, there’s more parts for younger people because younger people are out doing things, discovering themselves, making mistakes. Generally younger people live much more exciting lives and as such more movies made featuring them because people like to watch those things and not some old folks rambling around the set. There’s exceptions of course but I’m not sure why this isn’t brought up, yes young people are hotter but also they generally are in a more interesting part of their lives.