One reason why I believe Vekoma never improved their SLC's was enough parks were willing to buy them. You can price a flash game at $2,000, and, as long as there is an idiot willing to buy it, it will get sold. With SLC's, small parks were in need of a star attraction, and Vekoma offered a cheap one for them. Now, while I do wonder why they did little to make them better over time, the only thing that matters is that they created a design that some parks are willing to buy. Besides, more SLC's have been sold than B&M inverts.