I think DME could potentially leapfrog natural gas for Class 8 trucks. The biggest headache the Class 8 diesel drivers have currently is exhaust aftertreatment. DME runs so clean, it requires NO aftertreatment. No DPF, no SCR. It also retains the sparkless diesel combustion process, unlike natural gas trucks, which require spark-ignited engines. Storage and fueling are much easier as well. Storage pressure is only 75 psi, compared to 3600 psi for CNG and LNG, which needs to be stored at -260º F. It can be produced from a variety of methane feedstocks, including natural gas, and also municipal sources (trash & sewage). Very promising. The day may come for electric long-haul Class 8 trucks, but DME seems like a very promising "bridge" fuel for heavy trucks.