The .NET applications use SQL Servers on a very large scale. Basically, about 80% or 90% of the database platform is on SQL Server.
We are working on version 2019, but we are also now working on the cloud databases. Our goal is to stay away from versions. We are going to go version-less and move to Azure SQL or managed instance, which is version-less. This way we won't need to worry about any upgrades or any version changes because Microsoft is going to take care of these things. We will always have the latest and greatest version.