A lot of new age is slightly more watered down kosmische musik made with very specific purposes in mind, like I remember certain Michael Hedges records came with instructions. Although I doubt they’d ever admit it, some of it was made by otherwise legitimized kosmische musik legends like Tangerine Dream and Vangelis. The only difference is there’s no discreet new age rhetoric, although Vangelis was very much into glorifying epic terrestrial landscapes and that is very new age in its own way.
I always enjoyed the idea that somehow certain striated musical textures (kosmische, krautrock) are considered high brow and how smoothened (new age) textures signal something more pop.