sokoloff parent
The video of the aircraft crossing the road wings level (well after #1 separated) and maintaining relatively controlled flight until too much energy bled off suggests to me the aircraft was likely to be controllable to a landing if sufficient thrust was available.
..for a moment. If there was sufficient hydraulics damage it might've stopped being controllable.
And even if they worked the fire might've damaged the plane enough.
For example https://www.faa.gov/lessons_learned/transport_airplane/accid...
when they lost tail engine, all of the hydraulics went down
To be clear, we don't yet know if the UPS flight lost hydraulics or not. There are several somewhat redundant hydraulic systems.
(Also, as a result of the Sioux City crash you linked, there were several ADs issued requiring changes to hydraulics in these airframes.)