jm Bitcoin CashL³Devs already want to subdivide the Satoshi even further so for example 0.000000000000001 as the min value but they say this in very hard to do and they don't know how to do it yet
https://whatsonchain.com/tx/82c4bde7899488219394b50628788f3d1974b8c9c30f2279102ab515c37befa4