Brent Ozar points out a big enhancement to the way SQL Server Management Studio views actual query plans:
You can see the estimated and actual number of rows right there on the query plan just like live query plans! You no longer have to waste hours of your life hovering over different parts of the query plan in order to see where the estimated row counts veer off from the actual row counts.
This doesn’t require SQL Server 2019, either.
Read on for Brent’s thoughts on the matter.