It is both, it's a double-edged sword. On one hand, your brain can adapt very quickly to new stimuli and adopt good or bad habits such as problem solving or addiction. But, this quick adaptation also means you can 'unlearn' these things very easily too.
That's my pop-sci understanding of plasticity, i picked it up when trying to get rid of my bad habits.
That's my pop-sci understanding of plasticity, i picked it up when trying to get rid of my bad habits.