> This is why it's easy to lose the ability to produce something e.g. the big rockets that NASA used to make. IIRC, to avoid this when they shut down F-22 prod

> This is why it's easy to lose the ability to produce something e.g. the big rockets that NASA used to make. IIRC, to avoid this when they shut down F-22 production, they crated a huge number of DVDs documenting every step of the manufacturing process, so that knowledge wouldn't be totally lost.