Hypothesis of the limitation of memory(Japan Newton Press, Brain and Neuron, 2018): Participants who had extraordinary performance in episodic memory showed less than average ability in the opposite side, such as autobiographic memory, vice versa. Once one memory builds a specific neural network for long-term memory, the person seems to forget another memory/another neural connection becomes weaken.

q. If I develope diverse abilities simultaneously and constantly, fostering language, music, art, tech, science skill, and even memorizing numbers, the limit of brain’s capability matches the precedent study?

Maybe many genius people in history like Da Vinci could expand their brain’s capacity by mastering various disciplines with both artistic free spirit and intellectual curiosity.