The first improvement is the option to choose whether SSMS should prompt to save unsaved tabs when you decide to close SSMS. This is a simple change, but if you use SSMS to run many ad hoc queries and do not want to constantly close out and save each tab, this is now an option. The default is for SSMS to prompt when closing a window, but by unchecking the checkbox marked as shown in the following screenshot you can force SSMS to silently close these windows: