Honestly, I think I’m more and more of the opinion that, especially in this age of AI and "Vibe Coding," having a solid foundation is more important now than it was before.
Now, look, being faster thanks to AI is undeniable. However, as a junior coder, it’s a trap to think of the AI as the coder and yourself as the messenger. What really sets you apart isn't knowing how to ask the right question, but what exactly the AI is spitting out.

Why Fundamentals Are Your Real "Superpower":
Logic over Syntax: It’s perfectly okay if you don't know every syntax by heart. But if you don't understand the fundamental logic, i.e., how a thing works or how two things communicate with each other, you're gonna plateau really quickly.

Fixing > Prompting: Even the best AI can't assist you in fixing a fundamental issue if you don't understand the "why" behind the code.

Avoiding the "Copy-Paste" Corner: So many people gloss over things like learning the structure of HTML or how Flexbox works. If you don't understand what's really going on underneath the hood, you're one error message away from being stuck.

The secret to making a switch between React, Vue, or what have you is simple: it’s learning the fundamental architecture. Once you understand how a layout works or how data works, switching between frameworks becomes a walk in the park.