I enjoy the challenge and the sex. I think the speed limits in the hetero space to be with attractive women keep it interesting for nearly a lifetime. Things devalue when abundant, but it takes a lot for it to become abundant.
But even then, it's not disinteresting instantly, I'm around a lot of people with similar libidos and interest in sustained variety, who have achieved that, and brought similar people together. So I could really only say thank you for your personal account, it's a very individual journey not reflective of everyone else's experience with abundance.
I haven't really done much with material things, I live in and buy what's comfortable for me. But I know there is a large crowd that finds shiny material things attractive and its always an option when I want to optimize for that.
emphasis on attractive, read as in-demand, difficult to stand out amongst