Re: if we know the election results within 48 hours rather than immediately
If it takes 48 hours to get the results, you're doing it wrong.
France has been using paper ballots for decades now, and on Election Day, we know that we'll get the results for what we call the Metropolitan Area at 20h00 sharp. Results from the External Territories (La Réunion, etc) will obviously come later due to time zone issues, but half the population doesn't live there, so it's not really an issue for anyone.