Logical Grouping of Devanaagari Baaraakhadi

Came across this interesting realisation about the arrangements of the Baaraakhadi in Devanaagari.

This is about how you use your tongue and mouth cavity to articulate a particular sound.
There is a sort of logical grouping and progression about the arrangements.

क, ख, ग, घ, and ङ sounds are all articulated by the tounge against the back of the ceiling of the mouth cavity
For च, छ, ज, झ, and ञ sounds, we move forward and use tounge against the centre of the mouth cavity's ceiling
ट, ठ, ड, ढ, and ण are produced more forward behind the gums of incisors
त, थ, द, ध, and न are produced with the tounge against the teeth
and प, फ, ब, भ, and म are produced by the lips alone.

Considering the expertise on grammar that stands 2.5 millenia, this phonetic formalism is not a surprise.