But then you need to know enough about the topic already to know what is stable and what changes with newer versions.

Like, the "web dev boot camp" course I got from UDemy a few years ago as a guide for building a web dev high school course: I recently went back to to look something up, and the whole thing has been completely redone start to finish. Makes sense, considering that it's updated to the newest versions of Bootstrap and other libraries (and who knows what else).

I know nothing about Rust, but I would assume there are at least some libraries that have major new versions in the last couple of years which might change best practices somehow? idk. But the harder part is not knowing what you don't know.

And if you keep doing that, you'll start to get outdated documentation

switch search engines ffs