My watch almost never says Productive. It usually only does right after races or at the end of a training block. And I think that’s the point. Based on the TrainingLoad graph, Productive is an out of the ordinary increase in training load. You have to get the white line above the green bar - which takes a lot of acute load. Being there constantly is impossible as it’s too much fatigue. Build to it in a block, then take that rest week to lock in the gains. Then repeat. One of the first things my coach told me is that there is a time and a place to feel wrecked, to feel exhausted. You should not feel wrecked all or even a majority of the time. If you do, you are probably not making any gains and are only a few weeks away from burnout. But you also may only be one rest week away from feeling great.
On the other side of the same coin, recovery is how we maximize gains. The more we recover, the more we CAN train. A solid base, fueling, sleep, stretching, ice baths, less alcohol, taking a day off work, etc - it all adds up to better recovery which leads to more productive workouts. I don’t feel bad about my rest days anymore because I want to feel good for the workout that comes the day after the rest day. I want to do that workout well, not just struggle-bus through it. Quality over quantity. On top of that, my workouts seem to be just hard enough that I WANT to take rest days.
Here's a good coach interview vid that expresses a lot of the nuance of this, of quality over quantity.
Aside from all that...
I did another round of my MTB race series yesterday. Same course and conditions. I made a few equipment changes - better rear tire, fixed the rear brake, narrower bars that are more comfortable and more aero, ran diff suspension settings. My prev lap PR was 19:52, new PR is 18:34. And I cut 4:24 off of the whole race time, over 1min per lap and 5.4% faster. NP increased by 10w, 4w, 4w, and 9w. I think the time gained is mostly due to the tire, and some in the bars, some in the power, some in the brake, some in course familiarity, some in improved bike handling, some in drafting faster riders (cuz I actually kept up with them more ). Now i just need another minute per lap to be competitive.