Point of order, Bardic Inspiration doesn't necessarily have to used on your next anything, specifically. You can turn off the 3 reaction toggles and squirrel it away for later use. However, once toggled on, particularly for saving throws, it's usage is at the mercy of the AI, going towards whatever saving throw is triggered subsequently. If the player is judicious and games the situation just right, they can use it where it really counts and not just to avoid getting slowed when stepping on a surface by accident, the worst case scenario.
