For most of its history, Mono was buggy, lagging behind, and slow. It was only ever a solution of last resort, if you absolutely had to migrate an existing Wind

For most of its history, Mono was buggy, lagging behind, and slow. It was only ever a solution of last resort, if you absolutely had to migrate an existing Windows app to another platform. Microsoft tried to push it a bit once they bought it for cross-platform mobile dev (back when Windows Phone was still a thing), but that never took off to any extent either.