I think it would be informative and useful to establish a “betting market” on all of these “vaporware” schemes. Lots of announcements–lots of coverage–little actually certified and used.
Something like “What are the odds that the electric Caravan will be certified for scheduled passenger operations by this date in 2024–as stated?”
The stock markets react to both press releases, and the failure to perform. There are “futures markets” for commodities. You can “short” a stock. Watching the “Markets” on these proposals would be an indication not only of measuring the interest in the announcements, the perception of viability of the proposal by PEOPLE THAT ACTUALLY HAVE SOME SKIN IN THE GAME!