I got obsessed with a weird edge case: cruise ports. You get off the ship at 8am, you're back on by 4pm, and if you're late the ship leaves without you. No other kind of travel has that hard a deadline.
Most people either pay for a scripted ship excursion or wing it and hope they judged the walk back correctly. So I stress-tested Routinex against that exact constraint give it a port and your reboarding time, and it plans backward from "get back with room to spare."
