I read this one story long ago where there was a war between two spacefaring civilization. One was technologically advanced but fewer in number. However their attempts to improve their technological edge, worked toward eventually every ship being custom, unique …… until they lost the war under the weight of unique parts and maintenance that made their ships too expensive to keep running.

Even space ships need a supply chain, parts p, service, repairs. If we do ever become a spacefaring civilization, we’ll need many copies of relatively few unique models, like we already do with aircraft, cars, ships, and houses