OGG requires every table has primary key otherwise constructed pseudo keys. Pega platform OOTB tables all have primary keys. Some marketing intermediate tables may not have primary keys. The other limitation is active-active support--potential conflict on work item ID. Otherwise, we do have customers who use OGG.
thank you for the clarification, in our requirement, the table is used to export data class (like catalog, or association customer-product) to other system that needs the data, we don't plan to use OGG on work objects tables.