That's not where RStudio outperforms console R. You don't have to save a chart and open it with some other program, it opens a dedicated window for plots that you can put anywhere you want. Functionally it's the same thing.

RStudio shines when it comes to viewing data, global variables, and command history. Personally, I found the editor itself to be far too restrictive so I switched back to emacs and the command line. Also, as far as I know there's no way to get a true dark theme in RStudio where the entire application is dark, not just the code.