As a one-man, self-funded startup where every dollar counts, maintaining status is critical. It's much more than legroom and upgrades, it's also lower fees for some last-minute fares and the ability to sometimes change flights within 24 hours of departure for zero fee.
In September I made it from the curb to the gate at Heathrow in 27 minutes--it wouldn't have been possible without the agent at the United Elite desk.