Hi, and welcome to the forums!
I also thought the same thing when I was looking for a clan to join. "Wow, they've been around since 2003? That definitely means something!" It's been awesome to be a part of a clan and a group of like-minded individuals that have fun, play OSRS, and don't take themselves too seriously. I hope you find what you're looking for here, and it's great to have another PKer join.