I'm sure it is mostly because HDMI was ubiquitous before DisplayPort had any real market presence. Even if DisplayPort is generally better, manufacturers are pr

I'm sure it is mostly because HDMI was ubiquitous before DisplayPort had any real market presence. Even if DisplayPort is generally better, manufacturers are probably willing to accept the costs and limitations of HDMI to ensure their products are compatible with the majority of audio/video sources/displays.