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Not a chance. This would no longer be football.

I think it more likely they will get better helmet tech which is already happening. Some players even where extra padding on the outside of their helmet now.

The game will change somewhat, like it has for kickoffs and protecting the QB, to minimize injury. But fundamentally anything that trends towards "no collisions" will, I think, be a non starter.

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People also said it would “no longer be football” if forward passes were allowed, or when “downs” were added, or teams were allowed different lineups for offense and defense, or QBs were better protected in the pocket, or when pass interference became illegal. Rules change all the time. The sport adapts.
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At that point might as well take off the pads and play rugby union with everyone else
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