Moving your residence is a lot like loosing a limb to amputation.  You loose the ability to prompt certain memories back into focus.

Same with friends that are gone, died, or whatever…. Their experiences are part of what allows your memories to be invoked into focus.

In that sense, it’s like losing a limb…. You are still you… but the lose of a location or a friend or some other kind of familiarity—it’s like losing a capability—in terms of memory management.