One of the challenges of integrating Notch Blocks in TouchDesigner was that scaling up the interactivity could be tricky. If you needed 10 interactive touch points, whether from Kinect joints or touch screens, you would need to expose 10 different sets of transform positions. Then you'd import the Notch Block into TouchDesigner and have to map every parameter by hand. This could often take a while and made it hard to imagine scaling content up to higher amounts of interaction. With the new Exposable Arrays feature, this is a thing of the past!