As I recall, RTD's rule with the sonic screwdriver was that it can do anything except solve the plot, and throughout his run that was pretty much adhered to. And so far, through out Moffat's run it's being adhered to as well. That is the entire episode isn't solved simply by the Doctor showing up waving the sonic around declaring "all done" and then a bombastic version of "I am the Doctor" plays.
Compare that with the tricorders. How many times do Star Trek episodes (particularly the TNG-Voyager period) get resolved simply by fiddling with a tricorder, spewing technobabble, and then all is good accompanied by a bland one note piece of music because Rick Berman hates music?