Money ≠ identity Using money as identity breaks both its money and its identity properties I find myself repeating this over and over in different contexts. Avoid accepting unnecessarily large payments, because your customer might expect you to behave like a custodian. Avoid making unnecessarily large purchases, because your vendor may rug you. Small, frequent interactions!

The art is to release versions that improve on what's already released, rather than to "make the release ready". It will never be ready!