LX has containerized their entire 32S fleet including the 319. BA
do the same with the exception being that LX
has a special "DZH" container, which is basically an AKH cut in half, to fit in the small space that the containerized 319s have in the aft hold. The old BD
aircraft currently with BA
have yet to be re-fitted with container positions.
has bulk 319's but containerized 320/321s.
Anyone working with these planes will tell you it is a massive advantage over bulk aircraft. Not just the speed of loading, but also with cargo tie-down, and locating bags that have to be offloaded!