Trends are always changeable and its happening almost in every sector like graphic design, photography, technology so we can name it almost everything. Suppose if we take photography trends, then we can see before 10 years there trends was different than right now, at that time photographers didn’t conscious about any image editing service but right now they are doing it to make it so wow. So, vector design layout trends also change like this, before popularity of flat illustration was huge but right now it converted with 3d styles.