> There should be useful tools, such as small units for drilling pipe holes through concrete and rock. We already have cheap and effective mechanical drills ca

> There should be useful tools, such as small units for drilling pipe holes through concrete and rock. We already have cheap and effective mechanical drills capable of these tasks, and it's unlikely a brand new technology can compete with those on cost. Unlike in the actual design niche, where mechanical tools are infeasible due to the temperatures involved.