[s_y_n_t_a_x]

Not all functions needs hooks, not all hooks break pureness.

But my point was functions are simpler in all those scenarios, pure or not. Edited my comment to reflect that.

[csande17]

> not all hooks break pureness

Sure, if you define a function called useWhatever that doesn't actually call any hooks, that might be a pure function. But the restrictions described in https://reactjs.org/docs/hooks-rules.html are not restrictions that pure functions have.