In my opinion, there's a certain set of core rules, you need to learn, after which it's relatively easy to transfer your knowledge between programming languages

In my opinion, there's a certain set of core rules, you need to learn, after which it's relatively easy to transfer your knowledge between programming languages and domains. I'm fairly sure you can get this fundamental toolbox in any language. Btw. I don't agree with the sentiment that it's somehow easier to learn web development than writing device drivers or other closer-to-the-metal stuff. On the contrary - web development is chaotic and complex. Low level stuff is much more straight forward. It might be less accessible, but I don't believe it to be fundamentally harder.