I'm going to give a counterpoint to this (common) take.
I was an Emacs power user for almost a decade before I learned Emacs Lisp. I knew just the bare minimum to populate my .emacs file, and occasionally copied others' config snippets.
No need to rush into learning Elisp.
> Who's got a decade to spare, when they can wield the power in just a couple of months?
I was a power user within months - a year tops. I didn't say it took me 10 years to become a power user.
Ever since I learned Elisp (it's been many years), I wouldn't say my expertise and abilities has grown exponentially. It is merely an incremental improvement. It definitely is nice that I can now code away annoyances, but it's not the game changer people make it out to be.
> I wouldn't say my expertise and abilities has grown exponentially
Things always look easier only after you solve a problem, aren't they?
That is a known as hindsight bias (also called the "knew-it-all-along" effect). Once you've solved a problem or seen the solution, it seems obvious and you tend to overestimate how predictable or easy it was.
There's related phenomena known as the curse of knowledge - difficulty imagining not knowing something once you know it.
"The Mythical Man-Month" - discusses on why we underestimate complexity, it explains the psychology behind it.
There's also "forgetting the beginner's journey" or the "fourth stage" of learning where skills become so automatic you can't easily explain them.
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https://en.wikipedia.org/wiki/Hindsight_bias
Your psychology lesson is misplaced. I know my usage before and after, and it's a minor delta. The bulk of my Emacs usage today is using features that have been in my config since prior to my learning Elisp.
If we're going to be patronizing here: Most people who learn Elisp early into their Emacs experience are failing at identifying the source of their growing expertise, and are incorrectly attributing it to their knowledge of Elisp, when in reality they are merely becoming better Emacs users due to repetitive practice.
They also have a habit of reinventing solutions that are readily available within Emacs, or as a package.
I'm not trying to snub you nor am I arguing with you - my opinions are just that - I never said they are fundamentally true for everyone. Similarly, your experiences are yours - it would be wrong to generalize based solely on that data. There was no "schooling" here, the phenomenon mentioned fits this case perfectly, I just thought someone might be interested to learn more about it, that's all. Cheers to you, friend.
You just unironically proved my point. Who's got a decade to spare, when they can wield the power in just a couple of months?