That doesn't change anything that I see. Indexes and counters are usually not used for "continuous" metrics such as liquid quantities. And again, the biz domain

That doesn't change anything that I see. Indexes and counters are usually not used for "continuous" metrics such as liquid quantities. And again, the biz domain typically does not count fractional quantities, at least not in an indexed way. It's not a practical problem for most coding. If you disagree, can you demonstrate a problem caused by indexing arrays starting at one in a typical code situation/scenario?