It’s all a factor of managing work intensity and duration as well as duration of recoveries.
Additionally, it’s important to specify the context of the intended training effect.
The tempo runs, at least in my program, are performed in order to develop all that Charlie has spoke of over the years as well as to simply heighten the musculo-tendonous-skeletal durability specific to terrestrial movement (aka field based sport movements)
From a bionergetic standpoint, for us, the tempo activities (because it’s not just linear running for my guys) must be aerobic.
The other auxiliary exercises, however, are not restricted to alactic/aerobic parameters. Although all the abdominal reps we perform are typically accomplished in an alactic/aerobic environment simply because we generally don’t perform in excess of 20 repetitions per set at a moderate rate and this is followed by a 45-60sec rest and then another run or positional movement.