No I am not anything but sure.
I guess you can give it a try with SWS truck and infatry fire
Aaaaaaalright.
I did a highly scientific test and blew up 100 SwS half trucks with a shit ton of Commandos.
No abandon whatsoever. Chance of that happening naturally: 0,6%, assuming that the game does not glitch out because I used a LOT of commandos.
However I saw that the ATGs sometimes destroy the SwS to a optically "functional" (read: not completely burned out) wreck, while Commandos only make the burned out version.
I don't think that the SwS can be abandoned though apart from a super rare bug.
Therefore, Superhansfan: Replay or it did not happen.