I read recently that not using SAP - or heavily customizing it - in markets where it’s prevalent can break big(ish) companies. Apparently the interface to other companies (from which to buy or sell) is so much easier to setup when all have the same system, that using any other system is prohibitive. If you need to interface with hundreds of enterprises that all implement standard SAP, you become the expensive outsider if you don’t. Integration projects can take years and then fail, with nothing to show for - which can threaten a company’s existence. Better to use standard SAP „off the shelf“ and do as little customization as possible.