OpenDrive does not truly function as an effective backup solution or a collaborative synch solution (like DropBox) without file versioning, because there is too much risk in play.
If the last file you backed up was corrupt, or you or a collaborator made a mistake, and overwrote critical data, the inability to rollback to a prior version is a fatal deficiency. Note that nearly all of OpenDrive's direct and indirect competitors offer file versioning.
Trashcan is a nicety in this general realm, but not enough.
Without versioning, it feels like we need yet another system to backup OpenDrive, which defeats much of the purpose.
This is the one feature that may cause my company to seek another service provider, despite so much else to like about OpenDrive.
We would pay extra for this feature.