Egypt is historically much more stable than its surrounding region, all the way back to the Late Bronze Age Collapse. A stable supply of water and being located at a center of intercontinental trade helps.
The water supply of the Nile is no longer as stable as it has historically been. Ethiopia's new dam threatens the downstream supply for Egypt and Sudan.
Suez crisis ended with a tactical defeat of Egypt but a strategic victory over UK and France because both the URSS and the US told us to get home, so I don't think it's a very apt example.
Compared to other outcomes of the Arab Spring, Egypt looks pretty good. They didn’t get a true democracy but at least the state is functional.
Goalposts are getting tatty from being moved about so much.
Yes compared to the rest of the region, not sure that's a great benchmark.