Why dry fillers in combination with the Staenis grid?

Thanks to the Staenis grid, it is very easy to place dry fillers flat. Previously, the challenge was to get the grains flat, on which special/expensive floor elements from Fermacell, Gyproc, Knauf, etc. were placed. The Staenis grid provides a frame on which OSB or Durelis wooden plates can be simply attached. So, it's easier, cheaper, stronger and effectively 100% reusable.