Intranet and document libraries defined the early days of SharePoint. But, SharePoint has grown and drives business-critical applications for many.
SharePoint is unmatched in the enterprise and mid-segment because it produces business results fast, efficient, and cost-effective.
From a technical standpoint, then SharePoint online is superior compared to older versions of SharePoint. In addition, azure optimization behind SharePoint, seamless integration to the Power Platform, easy upgrade of custom apps, and more is an essential technology.