Regarding value creation, in economy there is the smiling curve [1]. It states that throughout the product development, the R&D stage and marketing stage create

Regarding value creation, in economy there is the smiling curve [1]. It states that throughout the product development, the R&D stage and marketing stage create the most value in the sense of profit margin whereas manufacturing itself create the least. IMO there is a third kind of value which is management. Things like software maintenance, customer service and all sorts of people work that are considered chore by many software folks. Anyway, I agree with carmack. I used to think marketing is worthless. Now I realise how difficult is it for others to buy in the vision you have. Essentially what marketing does. 1. https://en.m.wikipedia.org/wiki/Smiling_curve https://en.m.wikipedia.org/wiki/Smiling_curve