The critical power section shows my best ever. Considering that I started Zwift a long time ago, and I am in my 50s, I will probably never set any new records. It would be nice to be able to set the “best” line to all those after a certain date. That way, I could see how I am doing this year, or since some other time frame, like an injury.
In the past I have deleted the Zwift app and reinstalled it, or I have installed it on another device and all power numbers were reset to zero. Not sure if it still works that way.
Seems like this could help, but that you would permanently lose information. However, if that is true, then they might not have the information needed for this.