I thought about that, but it's a bit impractical to do when you work with cable, as opposed to single conductors I guess.
I recently encountered a place where someone had taken such a folded-over conductor, flattened it and pushed into a backstabbed receptacle... that didn't go well! I think that was the first and only overheated European backstab device I've ever seen. Those receptacles only take 2 conductors per terminal, but he had 3, so he tried to get two into one hole.
