Mass production and consumption belongs to mobile phones. If you need regular subject picture or video for sharing on social media, no cameras are needed.
Manufacturers who are only making consumer products are in trouble. Those who are in professional market are not. For those who are not aware, professional cameras are also made for broadcast, production and film industry. Canon is one of manufactures. Cameras and Lenses.
Panasonic also makes cameras for this market. And they are not cheap.
Those who are wining about camera and lens size needs to realize what quality comes with size. And image quality is not something always visible on mobile phones and tablets