>We, people who really understand the technology that the world runs on, are a slowly dying breed. We are still here as tech leads, managers, directors, business owners.

There will still be people at e.g faang/semiconductor companies

that do this stuff day2day and even push advances in those areas and have already created solid training materials for younger employees

If you're worried that this knowledge will disappear, then feel free to write it up in form of tutorials.