I've run RB since April 2008 and NEVER seen it crash, and I too run a lot of other software - over that time it's run with Office 2003 and 2010, Outlook Express and Outlook 2010, Firefox, IE, Chrome, video grabbers and editors, various photo-editing programs, ebook creators, Skype, Google Earth, Dropbox,a selection of anti-virus pragrams, FTP, webpage creation programs, and under Win XP, Vista and 7, and on PCs, laptops and a netbook.
Seems stable enough to me.
Rod