The removal of the debugger is the only reason to keep an older version installed side-by-side. For everything else, SSMS 18.x is faster, more stable, and more modern.
For a deep dive into the technical capabilities introduced in this era, you can refer to the official SQL Server 2019 Editions and Components documentation . sql server management studio 2019 new
SQL Server Management Studio (SSMS) 18 is the primary version designed to support the release of . While SSMS is now a standalone product updated independently of the SQL engine, version 18.0 was the first release to be fully compatible with SQL Server 2019's compatibility level 150. Top New Features in SSMS for SQL Server 2019 The removal of the debugger is the only
SSMS 2019 heavily emphasized Azure integration, reflecting Microsoft’s cloud-first strategy: SQL Server Management Studio (SSMS) 18 is the
: Securely mask sensitive data in a non-production copy of your database .