This movie is similar to Coffee and cigarettes. It's simple and there is more to it. It makes you stop and appreciate.
To be honest, it was difficult for me to watch it, because my brain was so desperate for stimulation. And that's the point of the movie. Today I saw this video essay talking about the movie's philosophy.
The video raises an interesting point. With ambition we place the future over the present. In a way hope helps us to overcome the struggles. That reminded me of "struggle" as a meaning of life mentioned by Viktor E. Frankl in Man's Search for Meaning.
Now is now, later is later.