(Even if people grab carryons, it's not that slow to disembark by Civilization's usual deboarding algorithm, which is actually quite fast; there is never any crowded aisle, and most passengers have disembarked through clear aisles walking forwards in unison before anybody with an even slightly complicated deboarding procedure tries to deboard.

If you showed them an airplane from a planet where people deboard much more slowly and with large empty spaces often appearing in the aisle, as those closest to exiting all try to exit first as soon as a not-completely-fully space appears in the aisle that they can lunge into, even at the cost of blocking all the other people behind them... pushing through crowded aisles to grab carryons from five spaces behind them, because carryon space was not efficiently allocated to carryons... they would not actually guess how bad things had actually gotten, on that planet.  But they would instantly and correctly guess that this planet's civilization was less well-coordinated than one would imagine people would spontaneously organize among themselves.  It's how dath ilanis would imagine seven-years-old boys trying to get off a plane, if no boy among the seven-year-olds had any leadership aptitude.)

(Even if people grab carryons, it's not that slow to disembark by Civilization's usual deboarding algorithm, which is actually quite fast; there is never any crowded aisle, and most passengers have disembarked through clear aisles walking forwards in unison before anybody with an even slightly complicated deboarding procedure tries to deboard.

If you showed them an airplane from a planet where people deboard much more slowly and with large empty spaces often appearing in the aisle, as those closest to exiting all try to exit first as soon as a not-completely-fully space appears in the aisle that they can lunge into, even at the cost of blocking all the other people behind them... pushing through crowded aisles to grab carryons from five spaces behind them, because carryon space was not efficiently allocated to carryons... they would not actually guess how bad things had gotten, on that planet.  But they would instantly and correctly guess that this planet's civilization was less well-coordinated than dath ilanis would imagine people would spontaneously organize among themselves.  It's how dath ilanis would imagine seven-years-old boys trying to get off a plane, if no boy among the seven-year-olds had any leadership aptitude.)

(Even if people grab carryons, it's not that slow to disembark by Civilization's usual deboarding algorithm, which is actually quite fast; there is never any crowded aisle, and most passengers have disembarked through clear aisles walking forwards in unison before anybody with an even slightly complicated deboarding procedure tries to deboard.

If you showed them an airplane from a planet where people deboard much more slowly and with large empty spaces often appearing in the aisle, as those closest to exiting all try to exit first as soon as a not-completely-fully space appears in the aisle that they can lunge into, even at the cost of blocking all the other people behind them... pushing through crowded aisles to grab carryons from five spaces behind them, because carryon space was not efficiently allocated to carryons... they would not actually guess how bad things had gotten, on that planet.  But they would instantly and correctly guess that this planet's civilization was less well-coordinated than dath ilanis would imagine people would spontaneously organize among themselves.  It's how dath ilanis would imagine seven-year-old boys trying to get off a plane, if no boy among the seven-year-olds had any leadership aptitude.)