Minimum effective dose is an interesting discussion, I wrote up a few thoughts here Sweet Spot Progression - #2478 by WindWarrior and after 2 years of using a “traditional modern” approach to training on 8-12 hours/week, I have a very different opinion on minimum effective dose. All I can say in summary vs TR AT approach, is that I’m doing a bit more weekly time and a lot less intervals (I last looked at TR AT plans 4 months ago). These types of comparisons are always difficult, but this approach I’ve nearly reached peak from fitness from 2017 (before TR).
It sure seems there is a lot of individual response to training, and requirements for dose and recovery. I imagine a ‘more is more’ approach might work if my aerobic capacity was higher, and I rolled out of an off-season with high fitness that just needed 6 hours/week of mostly intensity to quickly push it back up. But I’m not that athlete, and my aerobic base always requires a lot of boring work before I have enough of a foundation to layer on the really hard top-end aerobic power work.