[egl2021]

Read up on restarting Stinger production. Retired engineers had to pitch in to train the current generation. So I wouldn't say "totally fine".

[Solvency]

How is needing to train young people the same as deindustrialization exactly?

[fragmede]

It's the taking engineers out of retirement that's deindustrialization. A properly industrialized nation would have an active program with educators in the prime of their career to do the educating, and not need to pull someone out of retirement because there wasn't a need for them to train their replacements until after they'd retired.