I think in one release it was set to automatic by default - and that resulted in a raft of complaints from users that Calibre had messed with the collections they had spent a lot of time setting up manually on their Sony.
What I guess is needed is some sort of mechanism for advising users that such options exist. I am not sure how this could easily be done. Perhaps some sort of 'tips' message that gets popped up on device connection (that can then be disabled by experienced users).
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