Playground Results should appear in same panel as Terminal
The current behavior is to place Playground Results in a new document tab. It would be much more user friendly to place results in the bottom panel (next to Terminal, Problems, etc) to take advantage of vertical space.
AdminMassimiliano (Admin, MongoDB) commented
With Playground Results, we tried to use VS Code's default behavior and UX.
Having said that, if you move the Playground Results tab to where you find it more convenient, it will stay there.
If you want things displayed in the Output panel (no syntax highlighting available there though), you can use console.log().
The screenshot attached shows how it's possible to move the results below the playground editor and how to use the Output panel.