Practically I am often understanding how to write certain queries by starting out with a certain table or a certain row and then looking at the resulting subgraphs of tables or rows that are linked to it. I want to be able to bookmark a row and come back to it immediately.
Also tools like this also implement "save" in a way that is useless at best and sadistic at worst. Who really saves a bunch of SQL files in a directory like "Query001.sql"? If I want to "save" queries and updates I don't want to save them in a strange SQL-specific project. Depending on my project these are either going to be incorporated inside source code files or possibly saved in files that live inside a project I manage with a non-SQL IDE. If I want to "save" DDL these are either saved in the database themselves by executed or could be managed as part of a migration system, which I haven't seen a tool of this sort support. Although I never "save" files in that kind of tool, it is certain to try to stop me from turning my computer off so it is another thing that makes turning my computer off like