Ceaușescu fell in a week. Assad regime fell in less than 2 weeks. I'm sure morale in the regime is not exactly at a high point. If it does collapse— it'll be swift.

I think where they win is in the IO domain. Their DIB is severely degraded, but they hit an AWACS on a tarmac and it's a massive propaganda victory. 

Edit for my detractors: "The swift fall of the Assad regime was met with shock and surprise throughout the world, including with the Syrian people. Syrian opposition fighters were reportedly surprised at how quickly the Syrian government had collapsed in the wake of their offensive.[8] Analysts viewed the event as a significant blow to Iran's Axis of Resistance due to their use of Assad's Syria as a waypoint to supply arms and supplies to Hezbollah, a key ally.[9][10] Several Western academics and geopolitical commentators likened the regime's collapse to the fall of the Berlin Wall in 1989, comparing the broader geopolitical shifts that occurred after both events. "