You're absolutely right. You can't stay at that level for extended periods of time. The cap situation kills you. That's why I don't think the Packers are going to invest one nickel into extending Rodgers' contract. They'll make a two year offer with more incentives than base, then walk him out after the first year, letting Love have the job, good or bad. The Smiths will be going, we'll probably lose the only WR we have (Adams), and the three guys we have on the offensive line who are mainstays will also be gone.
Then we hear about the "youth movement," as it's making the team more competitive. Any guesses as to how many times I've heard that?
This is usually followed by several years of complacency and reduction of long term contracts, and eventually, a new set of leaders who vow that this will not happen under their watch. Then they work for a championship. But, that probably won't even begin until around 2025 or 26.