If your Analytic Accounts represent Cost Centers, Projects, Locations, Branches or Divisions - it may be useful to be able to run a Balance Sheet by those dimensions - particularly to manage capital expenditure for fixed assets or if you have pre-paid expenses and/or accrued liabilities.

If you have multiple companies in the same Odoo database, you may wish to post inter-company transactions to the balance sheet (as liabilities or capital investments) since companies in the same family don't always transfer cash between entities.

If you have several owners of a company, each who contribute something different (ie: inventory or fixed assets that would be recorded on the asset side of the Balance Sheet) or money (ie: cash that would be recorded on the liability side of the Balance Sheet) then you may want to use Analytic Accounts to represent the total amount of assets and/or liabilities that each owner has contributed to date (instead of using GL accounts).

Since you would then be able to calculate the percentage "ownership" each has based on the net balances in the Analytic Accounts, you may want to use them to distribute equity and/or retained earnings (again without needing a separate GL account for each owner).

Analytic Accounts can be tied to budgets, which is also another reason balance sheet transactions may be posted to an Analytic Account in addition to the GL account (to help with Balance Sheet budgets).