The most valuable development to come from the Western fascination with Yoga asana practice is the widespread understanding that emotional and psychological purification can occur through a profound body practice. Intelligent asana practice can weaken internal obstacles, transform minds, and increase sattva.
The worst development to come from the Western fascination with Yoga asana practice is the exploitation of and clinging to the body as a source of identity and manipulative power which contradicts the aim of Yoga practice and its path of attaining clarity, wellbeing, and ultimate liberation. Misdirected asana obsession has watered-down and mutated the true representation of the Yoga tradition.
Many shades of gray….