First: I am a happy RStudio user, and it has all the functionality I need for my work, but I would really enjoy either a "minimal" theme or the ability to customize the UI a bit. For my taste the RStudio interface is to cluttered with icons, toolbars and status bars that just feel distracting and are not super useful (to me). They also use up a lot of vertical space --- which counts on my laptop.
Would it not be possible to expose the RStudio UI design (xml? html?) to users so that they can modify it to their needs and create custom themes?