1. You have it as contingency in case opportunity knocks.
Means you can pull the trigger immediately, as opposed to having to juggle around first.
2. Long term want to phase out senior vets, EXTEND the young core, best possible financials. That means offering mo $ overall for mo years to reduce/minimize annual average salary --- and cap hit. This allows us to better control cap, not the reverse. And it means we max the value of our players as trading commodities, so, even though we are less likely to move parts of the young core, if we elect to do so we would have optimum combo of reasonable salary and decent term, not too much or too short.
Also, if Nash gets injured, that kills it
Move him now so it is not a possible problem.