You guys are missing the main points of why boomerangs were so successful: they have a small footprint, they're cheap, and they provide a decent thrill to the average person(six moments of being upside down). Think about building a small RCT park and you're almost done with it. You're almost out of space and you want one more roller coaster. You can't fit a hyper or a looper, or even a compact wooden coaster, so what's the next best option? A boomerang because you can shoehorn it into a tight space and it will attract a decent amount of people. It's also why SLCs were so popular. We may hate them, but they're quite a thrill to the average park goer as well as a cheap, compact investment.