Why might we choose not to implement all of the possible features in a particular BMS application?

Options:

1. Because the battery is inexpensive enough that the extra cost of additional BMS functionality is not justified
2. Because it is too difficult to design and build the electronics of a BMS that implements all of the feature described in this specialization
3. Because it is too difficult to design and implement the software in a BMS that implements all of the features described in this specialization
4. Because the battery is already so expensive that the extra cost of additional BMS functionality does not fit in the budget