Should We Shift Forward Onto Our Toes in Chaturanga?

You've probably heard the instruction to "shift forward onto your toes" before lowering down into chaturanga so that we find a 90° angle at our elbows. Is this alignment rule important? And is this the only way to practice chaturanga?

Jenni addresses this issue from an anatomical perspective in this video. Let us know what you think by sharing your thoughts!