It’s interesting and I love seeing the “payload yeeter” start to actually get traction, but iirc there is downsides. It’s not like you can just launch any old thing, the payload needs to survive more Gs and it only replaces the first stage. So still need fuel and propulsion.

So many interesting “hype” things either get lost due to development, or not panning out. So it’s always great to see when they “succeed”.