“Estimate stories and plan iterations or go with the flow. Analyze burnout chart or obsess about cycle time.”
These sorts of charts are called “burndown” charts in my experience, not “burnout” charts.
From https://www.merriam-webster.com/dictionary/burnout :
"Definition of burnout
1 : the cessation of operation usually of a jet or rocket engine also : the point at which burnout occurs
2a : exhaustion of physical or emotional strength or motivation usually as a result of prolonged stress or frustration
b : a person suffering from burnout
3 : a person showing the effects of drug abuse"
I mean, by the looks of the landing page, I guess (3) could fit somewhat?