Too Long; Didn't Read
Microsoft and Jira have been compared to Microsoft vs Atlassian for Enterprise Agile Planning Tools. Microsoft is a Challenger in the Magic Quadrant for “Enterprise Agile planning tools”, where they evaluated 16 vendors, including Atlassian, and Microsoft. Jira is usually preferred by frontend developers, and business units (Product Owners, Project Managers), due to working great with Confluence. So it makes total sense, to use both those tools, to integrate them, rather than choosing one over the other.