Trains should try and create a delivery from the station they just completed a delivery to

[asvanberg]

When using combined requester/provider stations, if a train has just finished delivering to it, it would be very good if the train checked if there's something that can be picked up from that very station.

Should be a quite nice reduction in the number of trains required since there'd be fewer empty trains moving around.

Bonus points if an incoming train to a station would make other trains prefer different deliveries not from that station since they would be handled by the incoming train after it's been unloaded.

[jagoly]

Unfortunately running the dispatcher an extra time specifically for when a train leaves a requester would be a huge amount of new code (it'd basically need to an entirely new dispatch function), so is very unlikely to happen.

More likely would be allowing trains to wait at requesters instead of heading back to depots right away, as discussed in https://discord.com/channels/1058170227000606811/1160486749722660864/1160486749722660864, which would also mostly provide the benefit you describe (among others), without needing a new dispatcher.