I venture a guess that you learned JEE by rote and not from first principles.
Learning by rote is stressful since your mind has to retain effectively a bag of (to it incomprehensible) technical trivia. In contrast, first principles are compact and generative, and such a grasp also informs your intuition so you can actually make educated guesses and jump in the deep end when picking up a new stack. Same principles apply to learning programming languages.
The biggest headache in picking new stacks today is the current trend of technical neologisms, so a bit of initial squinting (for recognition) is required.
Learning by rote is stressful since your mind has to retain effectively a bag of (to it incomprehensible) technical trivia. In contrast, first principles are compact and generative, and such a grasp also informs your intuition so you can actually make educated guesses and jump in the deep end when picking up a new stack. Same principles apply to learning programming languages.
The biggest headache in picking new stacks today is the current trend of technical neologisms, so a bit of initial squinting (for recognition) is required.