People going for 99 may be doing it for the cape, but a lot of friends I know are going for 99 herblore just because it's now a useful skill to have. The cape's are definitely a motivation, but some skills are actually worth the effort. I think going for a 99 is a skill in itself. After getting 99 in all melee stats and magic, I decided I wanted 99 slayer. It took me about a year of training it every day to get it, but I finally did. Now I feel like I can get any 99 I want. It's all about determination and whether or not you're the kind of person that can stick to it.