To be totally upfront fellas, it's all about the financial situation as it applies to income for the franchise.
I have no idea if successfully negotiating a new stadium is really necessary, or vital to the organization staying in ST.Louis ? But selling out seats, clubs, and boxes is ! The scary reality for those of you that want ST. Louis to still remain the home of the Rams, is that the inabilities for a deal to be struck, for whatever reasons they might be ?
Can, and will be used as a reason/s for the organization to be "left with no recourse" but to move the team to greener pastures. That is purely speculation, and conjecture on my part. However, it's based on historical transactions under the current NFL hierarchy.
I can relate that it is a fact that there have been rumors on many fronts that the league is considered to have prioritized LA as the number one city to get the next franchise, and the model being most looked at is the current one in place at Met Life in N.J./NYC
With one huge modern facility housing 2 franchises, with each being members of the different conferences.
Of course the 2 most mentioned are Jacksonville, and the Rams.
Time will tell..