You leave port with 10 replacements for every component of the encapsulated device. Or just a full replacement for it. Hidden complexity in the case of the die

You leave port with 10 replacements for every component of the encapsulated device. Or just a full replacement for it. Hidden complexity in the case of the diesel motor was made possible also because of know failure modes (how many years until the low hanging fruits all got solved, how many decades until the not so easy got too?) and standardization of its components (how many centuries just to understand and standardize the universal joint https://en.wikipedia.org/wiki/Universal_joint https://en.wikipedia.org/wiki/Universal_joint?).