If applications have evolved from custom solutions, the initial design did not include the majority of the 'multi' functionality, so it is often added on top or at a later date. This results in hard to extend and maintain applications, with significant overhead (Examples include Oracle's Multiple Reporting Currencies and Accounting Engine or SAP's 'Extended GL').
ALFOX ERP II is designed with all of the "Multi" functionality. You can enable it at anytime or switch if off, if you don't need it anymore.
By designing an application with the "Multi" requirements in mind, the resulting application is easier to maintain and to extend. Also the application is much more stable. The measurable benefits are lower implementation and maintenance costs in addition to significantly more functionality.