@chris The last update I saw was from late 2024 (youtube). Good interview with the project manager and a pilot. The interesting detail to me was that they expected the operating cost to be similar to the turbojet planes, because the have to retire the batteries after 2000-3000 cycles. However, that cost comparison was conservative and did not include the residual value of the batteries, or the current cost of fuel.Also, seems that the regulatory challenges are almost as difficult as the technical ones. https://www.youtube.com/watch?v=vbuHUSeWWFw