You are correct, the concept has been suggeste in the context of
- Multiple columns for contacts when drilling down from the summary pages into specific accounts Payee in an account - #15 by Patch
- When introducing another contact type Expense Claim Payer - can't have a Starting Balance entered - #13 by Patch
It doesn’t really worry me either way but thought it was constructive to explore requirements of how such a feature should work and the compromises involved in making particular choices
- core fields are common to most contact types but there maybe a risk of overlap in id number / code
- Business number is common to suppliers and customers
- Employees tend to have a different list of custom fields