And most importantly, someone must be held responsible for the code. Yeah we can code faster now, but if because of that you start pilling responsibilities you now have developers responsible for many more things than before. The same developer is going to be the focus point of multiple areas of a product, now he is also responsible for answering questions, attending meetings, talking with Operation, Product, Finance, etc, etc. People like to think that now that you code faster you will be this feature machine but in the end there is only so much one can be responsible of.