I think it is helpful to differentiate between mindfulness and concentration.* I would associate flow more with concentration. And if there is no mindfulness t

I think it is helpful to differentiate between mindfulness and concentration.* I would associate flow more with concentration. And if there is no mindfulness together with the concentration, time will just "fly by". At least for me. *As it is done in Buddhism, where both are separate spokes of the dharma wheel.