Dead money has meant nothing for the salary cap in a very long time. Fans and the media bring it up like it was 2007, but the salary cap is so large now that any team can easily sign any player they want regardless of cap space or dead money. The difference is that some teams, like the Cowboys, try to avoid making long term commitments to aging players like they used to do, but that's a choice, not a "We don't have a choice" strategy. Dead money would only impact a cap if it was $40-50 million in a season now and, even then, a team could still free up some cap space if they really wanted to badly enough.