I really appreciate this one. As a very high conscientiousness and med-high neuroticism person a manager asking for a "status check" on a project actually sounds like "You did something wrong that gave me cause for concern/doubt" which causes an inordinate amount of stress and self doubt that I'm truly giving it my all -- which leads me to push harder regardless of how hard I already am...
Celebrating progress allows me to say "Yeah, things may not be on our desired timeline, but also we're making progress and that timeline was unrealistic... We'll get there so long as we continue to invest".