Given how convoluted the timeline and alternate timelines are getting, with alternate versions of characters and such, as well as What If...? about to properly introduce the multiverse, I feel like we should start separating the characters and items of different timelines. It'll be way too confusing to have two different Lokis on the same page, with vastly different histories and likely different character arcs. Thanos is already pretty confusing with his two timelines, and the multiverse and more time travel are about to get REALLY weird, so I feel like this might be the best course of action.