i'm fairly sure that 10 years from now people are going to be citing joanna rutkowska articles with regularity. her flatfooted denial that security is possible without isolation is the only sane perspective.
the point is that starting from full isolation and straining to get things to talk to each other in the hope of achieving productivity makes sense. starting from full interactivity and straining to isolate but just when it's necessary "for security" is a battle we will all eventually lose, and we should know it already.