Usually, with Shift + G one can select other objects with similar properties as the active selection like Type or Siblings for example. However, there is no Material or Object data option in this Shift + G list.
Is there any other way to select all objects sharing a material or object data quickly?
Select Linked → Material (or SHIFT-L). Same key for Object Data.
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Oh wow!!! that does it. I can’t believe I’ve been using blender for so long and just discovered this exists haha.
Thank you 
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