I thought about that but...
1) the mould for creating the d24 already existed which saved hugely on cost,
2) a 60-sided die could be used for d3, 4, 5, 6, 10, 12, 15, 20 and 30 without re-rolls but you would need to re-roll it for d8, and
3) it would have to be pretty big to be readable -...