No, SharePoint is here to stay. Microsoft is making big investments in SharePoint Online, its integration with Microsoft Teams and other products from the Microsoft 365 suite such as the native integration with Power Automate and PowerApps. We can only guess if and when we will get a newer version of SharePoint on-premises, but the thousands of hybrid deployments are proving that organizations in specific industries and jurisdictions still have a valid need for an on-premises deployment while enjoying the benefits of the cloud, too.