Lost knowlege has precedent in history. That’s when 40k style Standard Template Construct come into effect. Which We already started with chat gpt and such. Just need to optimize it. Bigger issue is if humanity will progress In technology or remain stagnate.
People keep saying we need to worry about elderly but realistically if there is less manufacturing or service jobs from automation and people don’t want robot carer’s then technically there would be more care jobs open. Seems like will sort itself out in the end.