i have been in this DS for over decade and did some work on NN's and come along with Deep Leaning and people started ask this how easy and difficult is this after all you just train a nets with some data, (dont get into that linear or non) all we do is to put that one algo and train and wait , so what is so difficult of it, dont tell me it complex, before use this word , tell me what is complex of have you invented anything or framework no, 99.9 we are just using these technologies that some brought our plate , given this how difficult or easy this deep learning and data science on whole