Eric Pincus of Basketball Insiders:
The exact salary cap is always important. Every year, teams try to make moves that are barely allowed or barely not allowed.
But the 2017-18 salary cap is particularly important.
The new Collective Bargaining Agreement sets exact amounts for things like the mid-level exception and minimum salary. For the rest of the CBA, those change by the same percentage the salary cap changes.
So, if the exceptions/minimum salaries/etc. take up a particularly small or large percentage of next season’s cap, they’ll take up a particularly small or large percentage of every seasons’ cap for the duration of the CBA.