Interesting article. One point though. Academic discussion sometimes begins with the mundane or impossible scenario, but never ends there. Reason being sometimes we require an understanding of the mundane or impossible to figure out what is important and why that particular feature is important. Without structure imposed on TA by academicians, TA would be like approaching a sorcerer or magician for investment advice. There are many realistic models out there that embed realistic assumptions, inclusive of my work in the field of finance.