The printer has all the info (location, height, etc) about the model, down to the layer level. But I doesn’t have to come to use these info. For a first solution, if a PEI plate is used, the finished print can be easily swept away from the plate after it cools down. A sweeping arm or fork will be needed and the door redesigned to be operable.
Removing the prime line is a bit more challenging. But there should be a way. Maybe a small handle can be created on the prime line, similar to the way purge tower is created, to allow it be swept away. Or if it can’t be swept reliably, then a mechanical arm can pick it up. Or totally rethink the prime line. Is there another way to prime the nozzle without laying a line down on the build plate?
These are just some casual thinkings, it may or may not work. But if a team of engineers puting their heads together there should be a solution not too far down the line. It will add cost to the printer, but customers may be willing to pay for the feature.