In preview – Azure SQL Database managed instance business-critical tier in preview
The business-critical performance tier is now available to Azure SQL Database Managed Instance. Designed for mission-critical business apps with high I/O requirements, business-critical supports high availability with the highest level of storage and compute redundancy.
Save more during this preview with Azure Hybrid Benefit for SQL Server, which provides up to 55 percent off the license-included full price when applied.
Source: Azure Roadmap