Worth mentioning how LLMs can save you tons of time when you need to work with badly documented system libraries (in my case libudev) as it streamlines your examples and forums crawling in order to understand their API's.

For me, it's the technology I'm most likely to reuse in the future for different purposes. If AWS shuts down, I'll be obliged to find a new service provider, study its dialect to use what it offers, and so on.

In my opinion the problem is that usage and understanding of AWS can too be marked as a special skill set. But I also agree that AWS provide a well thought pattern abstraction such that you don't need to reinvent the wheel. The question is: what's most worth studying?