[NonZeroSum]

You can re-invent the wheel for future use, but for now we need to get going as inexpensively as possible.

There was nothing inexpensive about the Saturn. Its cost was the reason we quit going to the moon.

[SteamShovel]

There was nothing inexpensive about the Saturn.

I was referring to development cost, not production cost.

[SteamShovel]

I mean, the design is already completed. The development cost has already been paid. It is cheaper than creating an entirely new system.

Even a review and partial redesign with new materials and methods would be less costly to do than an entirely new design.