Tachyus uses F# almost exclusively. We have had great success with it. Just released 2.0 of our stack to production. After a week, still no issues. We use it fo

Tachyus uses F# almost exclusively. We have had great success with it. Just released 2.0 of our stack to production. After a week, still no issues. We use it for server-side web development in Azure, iOS app with Xamarin, and Raspberry Pi Linux. Fantastic integration with SQL Server throught the SqlClient Type Provider. It's great having one language across platforms.