[R] R vs. RStudio?

[Boris Steipe]

Could someone kindly enlighten me whether there are currently advantages to use R Studio vs. the normal R GUI? On the Mac I can't seem to find anything compelling, on Windows (which I don't use myself) I noticed last year that there seems to be no syntax highlighting available for the R GUI but R Studio had it.

Surely there must be some value proposition in that project, what am I missing?

Thanks,
Boris