I would love to have that, we are after few events and items from them start to be a problem in players inventory already, I would like to keep them all really.

Items have great design, and it's always fun to collect them, why we should even consider to get rid of them, in order to get some more space.

What about idea when we can keep them all, in extra inventory designed for that purpose? Like in WoW companion system for example, we could have as many as we like, and always be ready to use them, even just for fun!