Are Sales Proving That Full Frame is Beating Small Sensor Cameras?

Everyone can say that full frame cameras are good and that smaller sensors don't mean much of a difference. But it seems like manufacturers have a different idea. They're flooding the market with full frame cameras and there haven't been many APS-C launches accordingly. With so many full frame cameras in the market, why would anyone necessarily go APS-C at the prices they're at right now? Fujifilm is a welcome exception with the rendering of the X Trans sensor and its stunning lenses. But manufa...