I don’t think you’ll ever get there for flight personally. Just need to accept synthetic aviation fuel as the only real option for energy density (both volume and weight) and accept certain modalities being absolutely priced out of air transport.
I guess my main issue is you’re now flying around with those takeoff batteries and extra engine components. Is that really ever going to be worth it for anything but those short hop flights this is designed for? And if not why are we even investing in this because those short hop flights frankly need to be eliminated for trains anyway.