Spurs are different now in a critical respect. They reshaped their front office and brought in Scott Munn who has built a staff that is centered around the type football he was familiar with from his time in City Football Group. Whatever I think of Postecoglou and Munn's hiring (I didn't like either), you can't say Spurs don't have a direction that is clearly different than prior to their arrival. That's why Postecoglou being fired is very unlikely. If the Postecoglou hiring was a mistake, it is an early failure for Munn, who pushed Postecoglou to Levy, and a repudiation of the idea Spurs could emulate the City model on the pitch (but, on the cheap thanks to Postecoglou's innovative system). From a business standpoint, the rationale for Munn also involved the idea that teams could increase revenue by cultivating an international fan base. Firing Postecoglou wouldn't be an ordinary change, it would be an embarrassing failure of the new system. Not going to happen anytime soon.