You need to upgrade the ERP system if you cannot access it from your mobile phone. Remote working is one of the popular trends in businesses; therefore, it is important that you're able to access business information while on the go. You get to enjoy information access ability in real time when you can access your ERP system remotely.
You need to upgrade your system if you begin to notice that there are no longer releases or features that are being given by the developer. An ERP system with regular updates means that it has no compromise for data security.