Dagg is an interesting case. His 2016 form, either at fullback or on the right wing, was so dynamic for the All Blacks that he may just want more of the same, still at just 28. Will he enjoy his footy as much as, say, Toulon, where you cannot be world-class other than in your bank balance?
There is a precedent for All Blacks departing in July, mid-season. Justin Marshall played against the 2005 Lions, though by then had ceded the starting halfback berth to his old sparring partner Byron Kelleher. Marshall then headed to Leeds, his time done at 32.
Where once it was the norm that those All Blacks in their early 30s would often fly the coop, now they are going in their late 20s.
If New Zealand Rugby fail to re-sign Smith and Dagg, so be it. Their exits will erode the outside back stocks, but Damian McKenzie will come straight into the fullback reckoning, as will Rieko Ioane and Nehe Milner-Skudder on the flanks. Depth is not a concern among the All Blacks, and their succession planning is rather more sophisticated than it was in 1998, when Sean Fitzpatrick, Frank Bunce, Zinzan Brooke and Olo Brown all departed at around the same time to general gnashing of teeth and the shame of five test losses on the bounce.
Over to you, Chris Lendrum, NZ Rugby contracts man. This is no major exodus, but there is work to do, and it may not be enough.
Front-line All Blacks yet to re-sign beyond 2017
Kieran Read (expected to re-sign)
Sam Whitelock (expected to re-sign)
Ben Smith
Israel Dagg