That's true, but I thought they could start luggage service again once the train is ready, like they used to do for DME before covid. In fact, I believe that is Disney's plan from the very beginning in getting a train from DS to MCO. Because it only makes sense. Have the train do most of the route, then the rest can be done by each resort's DS bus, which must be a huge savings for Disney, as well as reduce fuel use and road traffic.
Most people won't like the roundabout way of taking the train and then transfer, especially after a long flight, but they will accept it if it's either the free train+bus or uber from the airport. And, of course, if the train doesn't end up being built, then this is not going to happen and uber will be the future.