I don't know if thats all true, we have our a/c's regularly catered with other airlines trolleys, atlas boxes and tea pots.
Just the other day we had (all bar one) BA teapots, several BA, Air Tours, Dan Air and Britannia Atlas Boxes, mixed in with our own.
Some of the older a/c we had when you looked in the oven it was like looking at rings on a tree, each oven tray was different like it read back its previous owners!
I wish there was more surface space on the top to arrange everything. Some trolleys have small metal trays directly under the top, before the drawers, but these are usually missing or bent so can't be pulled out, and when you pull it out if you place anything on them they just fall down!
Above all though, i just wish for CLEAN equipment, the trolleys are disgusting along with the drawers, atlas boxes etc. My hands always have dark smudges from the trolleys, i'm filthy by days end!