In the era before cloud technology, information technology outsourcers (ITOs) used to pitch their services as "we'll run your mess for less." This referred to the complexities of managing on-premises solutions, including data centers, network infrastructure, servers, operating systems, applications, databases, and security. The promise was to deliver the same level of software application availability (99.999%) while reducing costs and minimizing headaches through economies of scale and offshoring.
However, the rise of Software as a Service (SaaS) has disrupted this model. Cloud software providers now handle a significant portion of the "mess," but not all.
While they take care of the infrastructure and applications, your IT department is still responsible for configurations, data management, feature customization, deployment of new functionality, identity, and security setups, and other factors specific to your company's use of the software capabilities.