What is decisive often is not the pros and cons of the individual systems but if the particular system is the right energy supply for my application in terms of cost, durability and installation space. For example, if you compare only motorised cable drums to energy chains, there is no blanket answer, because in the industrial world there are no two applications with exactly the same conditions. Each aspect is weighted differently. Some points are in favour of the motor cable drum, including the simple assembly. Others are for the energy chain, such as the cable protection, the largely maintenance-free operation and the extendibility. Download the system comparisons on the igus website for free and get your idea of a better energy supply for your application.
Energy chain systems vs. festooning:
Energy chain systems vs. motor cable drums: https://www.igus.eu/info/cable-reel-vs-e-chainsystem
Energy chain systems vs. busbar system: