So we know when its position has been changed, without us having to maintain a "current status" variable to remember the old and new state after detecting #PB_Event_Gadget for it.
There's a deeper topic about it here ->
viewtopic.php?f=13&t=74920But every post there is just a workaround, when a simple #PB_EventType_Change notification would be great. Sometimes you just need to know if it's been moved, rather than care what value it now is, and watching old/new values is the extra code needed at the moment to find out. Thanks.