The only people using MSSQL Server are people deep, deep in the Microsoft ecosystem. Think government work, and those unlucky enough to work at a pure Microsoft shop where every problem looks like a Microsoft or Azure solution.

It's not a dominant database anywhere on the outside.

On the flip side, every single MSSQL instance that I've encountered has been legacy. For at least five years.

It's "legacy" because it's essentially tied to Windows. Yes, technically it works on Linux, and no doubt that was an amazing feat, but no serious company is running MSSQL on Linux when all the documentation, all the best practices are all based on running that on Windows.

Even Microsoft considers Microsoft SQL Server legacy! It's had virtually no new features added between 2022 and 2025 other than AI and cloud integration. All the truly capable people have long since left that team and moved into various Azure and Fabric teams.

To give you an idea of how bad things have gotten, there's like one guy working on developer tooling for SQL Server and he's "too busy" to implement SDK-style SQL Server Data Projects for Visual Studio. He's distracted by, you guessed it, support for Fabric's dialect of SQL for which the only tooling is Visual Studio Code (not VS 2026).

There's people screaming at Microsoft that they have VS solutions with hundreds of .NET 10 and SQL projects, and now they can't open it their flagship IDE product because the SQL team office at Redmond has cloth draped over the furnite and the lights are all off except over one cubicle.

Also: There still isn't support for Microsoft Azure v6 or v7 virtual machines in Microsoft SQL Server because they just don't have the staff to keep up with the low-level code changes required to support SSD over NVMe with 8 KB atomicity. Think about how insanely understaffed they must be if they're unable to implement 8 KB cluster support in a database engine that uses 8 KB pages!!!