All standard drawings for patio installation show a base gravel layer. What is the purpose of this layer? Depending on the answer, I am curious what this forum feels about this product as replacement for the base gravel layer: https://www.alliancegator.com/products/gator-base/
A base gravel layer (with different stone sizes, larger at the bottom) is clearly needed for permeable patios to absorb/hold the water. But the base layer was required before permeability/water runoff became a thing, so I wonder if there is an additional purpose? Or has water absorption to prevent pooling/runoff mitigation always been he reason in which case I don't see what problem his product solves.