I agree. They have not spent all this time incorporating and testing automation in the current Mark VI just to scrap the whole concept within the next decade. The testing has driven the Mark VI well past the 20 year lifespan. The DLR Mark V was retired on time and the VII appeared on schedule. I expect the Mark VIII to appear in the next few years at WDW with the assumption they can keep the beams together for the next 20 years. After that, however, the question becomes interesting. I suspect the infrastructure will be about played out, especially on the EPCOT line, and capacity will have long been maxed if Park growth resumes. There are only so many trains you can run at a time. So I expect one more generation of trains at WDW and the planning for a replacement will take place in that period.