Adidas Stan Smith: the gauge of streetwear trend?

The fact that a federal judge ordered Skechers to stop selling sneakers that copy the Adidas Stan Smith design doesn’t surprise us, since the shoes, born in ’63, can be considered the measure to understand the trend in fashion streetwear, at least in the last 10 years.
Just last year, Stan Smith sales exploded (also due to Adidas’ smart marketing) and already one year later no one else seems to care, while new footwear brands try to copycat its simple and clean style. Are these two attributes the key leading to a long lasting identity?

To know more about Stan Smith :
 http://uk.businessinsider.com/why-everyone-is-wearing-stan-smiths-2015-7?r=US&IR=T