I'd like to know who managed to mess up their A320 bad enough that they needed the middle wall sections over the wingbox on both sides of the fuselage.
How odd that they cut JUST that section out, and in perfect rectangles, too.
Notice the cockpit has also been surgically removed (someone's flightsim, perhaps?) ...
As for why? Simple : high cycles, older model, probably due for a D-check, and likely worth far more in parts/salvage then as a flying airframe.
Sad, but it's simple economics.
Relatively new 737-300s and 400s, MD80s, et al have all met their fate 'cause of the same thing.
As much as we hate to see old (or even not so old) planes go away, remember that Boeing and Airbus have to sell NEW
planes ... and the size of the world's airfleets are finite in size (and in fact, getting smaller as the airlines shrink themselves) ...
You can't have new without disposing of the old. What doesn't go to 3rd world airlines, goes to the desert, then to OpaLocka.