Why still USB 2.0?


I have noted many streamers , or int. amp still having USB 2.0 on their machine, especially the USB B socket.But form computer pov today is USB 3.0 or above dominant already, and type  C plugs are widely abailable . Why the audio industry still prefer the USB 2.0? 

 

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The high end audio industry is slow moving because it requires a lot of time and research with materials and designs to release something of superior sound. This takes time.