Why Transition Away From It?
Eventually, beginner runners will get to the point where they no longer need walk breaks to extend their run beyond the 30- to 45-minute mark. When this happens, it’s generally better for fitness progression to run the entire way since running stresses the aerobic system to a greater degree.
Furthermore, as runners become more experienced, they tend to develop specific race time goals, like breaking 30 minutes for the 5k. The fitter you become and the higher you set your goals, the harder you will need to train to attain them. Reaching faster time goals will generally require running for the entire race distance. As such, preparing for this during training is important.