The tools have radically transformed too. Imagine the Beatles as teenagers when electric guitars and amps were just beginning to be manufactured at an affordable (somewhat) price. Compare with now, the multitude of software and hardware components we have at our fingertips including video editing and a huge library of clips to create audio and video. The discipline is still required but the amount of technology (including instruments as tech) and techniques to learn has exponentially increased. Add to that the business sense needed to make money from it, for example marketing techniques etc, it's a big big world and Artist have just recently been given incredible power-ups that we haven't fully mastered yet.