Also read recently that european armies were relying on ukrainian cargo plans for transporting large items that A400M can't handle. And are now considering developping their own large cargo plane. These things are rare and apart!
Sounds like one big step already taken is in low altitude altimeter development. These folks did a good study on radio altimeter integration in GEVs: https://www.sciencedirect.com/science/article/pii/S147466701...
This is DARPA and some defense contractor wanting to cash in on Biden's big increase in military spending.