I wish they had them at all airports for getting on standby on an earlier flight after a delay when there are no gate agent manning local gates, seat changes, interline checking (ie this week I am flying Jet Blue JFK-AUS and WN AUS-DAL), get to the airport early after clearing security see that there is a flight and go home through another hub, get on standby list as EXPLAT even when bad gate agent won't put new passengers on .......