@jjmc , the revised plans appear to progress each energy system by 0.5 +/- 0.1 each week. For example, Sustained Power Build Threshold workouts on Thursdays are 4.0, 4.4, 4.8 whereas the Saturday VO2Max is 4.8, 5.4, 6.0 and the Sunday Sweet Spot is 3.0, 3.6, 4.1.
As I understand how TR implemented AI/ML (and I’m not in the beta) your subjective feedback at the end of a workout will combine with how well you achieved it to accelerate or slow down the default progression. So, if you nail a 3.0 Sweet Spot workout and mark it as easy your next one will almost certainly be more than 0.5 +/- 0.1 higher. Whereas if you fail a workout and tell the system it was too difficult then your progress will (may) backtrack. If you complete a workout but really struggled (and tell the system) then you should still progress but more slowly (maybe 0.2 or 0.3).
@Jonathan, @IvyAudrain, please correct me where I’m wrong but at it’s most basic operation (and I recognize it is way more complicated) this is how I believe AT to work in general. Thanks!