Why cant mobile depots and anchorable containers enter abandoned state, like citadels, without any timers after a week if unattended? Then week after that it would be automatically removed if still unattended. That would make space clean “itself” a bit faster. Waiting 30 days for them to be automatically removed is too long.
A mobile depot by its by nature and (one of the) intended purpose(s)/use case(s) should be semi-permanent. It needs to be something that sticks around for you to come back to in a region of space you are operating in. If it enters abandoned state, then you lose your stuff in one attack, and if you lose your stuff so easily, nobody will want to use it, and it nobody wants to use it, then there’s no point to having it exist.