Breaking changes are documented at https://docs.microsoft.com/en-us/sql/database-engine/breaking-changes-to-database-engine-features-in-sql-server-2016.
I think you are right that it does not affect hibernate directly.
If you look at the deprecated features I recommend to remove the database dialects for mssql up to 2008 as the dependencies to jdbc driver versions and jre versions are a constant source of errors and even if it looks working you can get silly errors.