Here's what bothers me.
I'm not sure of the probability of this ever happening but it has to be considered by PITT.
Let's say Heinz field gets out of date, run down, to costly to renovate, parking lots keep being converted to other purposes, no place to tailgate, heavy gameday traffic, fans complain so the Rooney's say F this we'll build our own place somewhere else.
What's PITT's plan B?
Maybe PITT's plan B is this will never happen.
The thing to remember is that most of the development on the north shore is associated with the Rooney's and Steelers. So the buildings that are taking up parking, the bars n restaurants etc are all there ONLY because of the stadium. I'd find it nearly inconceivable that they would relocate to another part of the city as a result.
That being said....I was very closely following the Chargers/Aztecs situation. If the Chargers end up leaving (seems unlikely now that they are re-negotiating with San Diego) the Aztecs would have been able to remain at Qualcomm for at least 5 years. Which would give them time to come up with a plan for their own stadium. Basically San Diego wasn't going to demo the place until the university could figure out their "plan B"
I'd assume unless there was some type of structural safety issue at Heinz that made is dangerous once the Steelers left, that a similar arrangement would be in place.