Habit Formation Windows
Research in habit psychology suggests that financial behaviours established in early adulthood tend to persist. Not because they are optimal, but because habits reduce cognitive load and the brain defaults to them under pressure. This cuts both ways: habits that work in your favour early can be remarkably durable, and habits that do not can be equally persistent.
The implication is not that everything must be perfect immediately. It is that the period of early adulthood is one in which the cost of establishing a small saving habit is low relative to the long-term effect of having it.