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Though 1848 (Napoleon III being elected President of the Second Republic) could also work for this question, what if Napoleon had somehow found a way to survive thirty more years on St. Helena?
What effect might this have had on the revolutions in France around that time?

Though he'd be 78 - 81 around this time, I wonder if him being alive would've helped or hurt the power plays of his nephew (edit).

Additionally, if Napoleon III's coup still happens as per OTL, is it plausible to consider that Napoleon I might've been brought back to Paris for a third go-around as Emperor (maybe as a figurehead)?
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