Oh, no, no, please don’t do that! The negative outcome from combining 1d+ steps with FSRS is so minimal – I think it’s much better to leave folks’ steps alone. Let them reach the point of deleting those steps on their own, after they start seeing/trusting that FSRS works.
Or at most, just let it be another gentle warning box like we have for insertion-order and use-FSRS-on-all-platforms?
