If the cap wasn't real, Amari Cooper, Tyreke Hill, and Davante Adams never get traded.
It's the only rebuttal anybody ever needs against somebody who says the cap isn't real. Just because the Rams manage to sign a bunch of high end players every year doesn't mean every team can.
And ironically they can do that because they frequently don’t overpay their own guys just to keep them - and use the comp pick system to their advantage