Product : Microsoft Corp, Azure Stack/1903, IaaS + PaaS
Feature : Maturity, Assessment, General
Content Owner:  John Gallucci
Summary
Azure Stack was made publicly available June of 2017 and builds off of Azure which has been available since February of 2010
Details
https://azure.microsoft.com/en-us/blog/microsoft-azure-stack-is-ready-to-order-now/