This post shows you some differences between Azure Data Studio and SQL Server Management Studio. From the market you will hear ADS is going to replace SSMS, maybe not now because many features in SSMS is not available in ADS yet.
There are so good points in ADS.
1. ADS can see the database on the first page.
2. ADS will open the last file that you were using when the program starts.
3. ADS will highlight the whole row when it is selected but not SSMS.
4. In SQL Server Management Studio you can have Intellisense. ADS will have intellisense but you need to select the database on top and not at the right side.
When you right click on the database in ADS there is nothing much you can do.
As compare to SSMS.
From here you can bet SSMS will still be around longer. I will continue to compare them later.