As a slight nit-pic, the actually question is not about why client side is more difficult than server side it is actually about the cost of engineers based on t

As a slight nit-pic, the actually question is not about why client side is more difficult than server side it is actually about the cost of engineers based on the assumption that client side is easier. For me personally client side is easier because I prefer a stateless server architecture, that is achieved more elegantly through maintaining state client side. As far as easier is concerned I mean that it is easier for me to achieve what I feel is an optimal application architecture. This does not necessarily imply that the code is easier, or that it will take less time rather it implies that it is easier for me to achieve an what I feel is an elegant system utilizing a stateless server architecture. With all that said, it has been our experience that we deliver faster with the new stack as opposed to the older server side stacks. But there are a lot of variables in that so it is by no means empirical.