--backup-dir with delete

Any chance to see --backup-dir supported by delete too?

Alternatively, can I assume that:
rclone copyto remote:file/to/delete remote:<backup-dir>/file/to/delete<suffix>
followed by:
rclone delete remote:file/to/delete
would have the same effect?

This would be quite easy however you can just recast your command as a move

rclone moveto remote:file/to/delete remote:<backup-dir>/file/to/delete<suffix>

would be more like it.