I'm betting that a great number of those older records that were re-purposed as newer items already have users associated with those newer items...so, as far as I'm concerned, they can stay as-is.
Coordinating the clearing out of those users that own those re-purposed records, then creating a bunch of new records, and then reassigning those owners to those new records, all the while maintaining every purchase detail for each of those users/items is certainly not an easy task. Gnaw, one such re-purposed record, has 194 owners, so....yeah.
I understand the concern overall, but just to address Kickback (and Gnaw), they were carryovers from Generations - remember when Brawn and Gnaw (with Mini-Cons) were planned but never released? Well, in this instance, those records were re-purposed as Titans Return Kickback and Gnaw, so that explains the 2013 "added to" date. Again, that's just to explain this specific case, but yes, we have re-purposed unrelated older records in the past.
I'm okay with deleting defunct records from this point forward, but as far as the rest of that goes...not so much.
MIKE
engledogg