Prime Minister Malcolm Turnbull might do well to try to keep Andrew Robb on as Trade Minister for as long as possible. His departure will weaken cabinet at a point when Turnbull needs all the experience and good sense he can get.

One of Tony Abbott's pitches in the lead-up to the 2013 election was that he had a team with ministerial experience from the Howard years. This made a virtue of the fact that he couldn't bring himself to cut out dead wood like Eric Abetz, Kevin Andrews and Bronwyn Bishop, but there was an element of truth to it -- Joe Hockey, Julie Bishop, Malcolm Turnbull himself and Abbott had all served as ministers under Howard. Turnbull, however, took the opposite approach, hacked out the dead wood and rusted-on Abbott supporters and went for new talent.