Some European low-cost airlines, like easyJet and Ryanair, require you to check-in 40 minutes prior to departure. If you arrive at the airport after this time, you will be told that check-in has closed and you cannot therefore proceed. You would consequently be buggered.
Would you think that a check-in-10-minutes-before-departure option (or possibly a 15- or 20-minute option), which would be payable as a supplement at the time of departure, would be a good idea? It would enable people to purchase this, thus meaning additional revenue for the airline, and so they can spend extra time in bed and not spend more time than necessary at the airport. It would also be of use to those whose time is limited for whatever reason. It might also be purchased ‘just in case’ someone arrivals later than expected at the airport, so a ‘safety’ and 'reassurance' measure.
Those passengers who have chosen this add-on could be fast-tracked to the gate of departure.