Music is more than just sound combinations, and most songs today use the same patterns and notes as songs of the past. Everyone of every generation thinks that the music they heard growing up is original, when really ideas are cyclical, and that's becoming more clear in the mainstream industry. There are so many unique ideas outside of the mainstream industry, no one person could hear them all in an entire lifetime. I think the music industry will always be okay. I'm also a huge supporter of borrowed ideas, I quote Jarmusch all the time: "It's not where you take things from, it's where you take them to." Every idea is inspired by something and that is how growth occurs. Reoccurance is bound to happen and that is perfectly okay.