Just an observation on how drones will change the game of military spending.
Most countries try to maintain both an army and air force of some sort. But for small countries drones are going to replace expensive aircraft in both the close air support and recon roles for low to medium intensity fighting. This is a technology that is fast becoming cheaper and more deadly. The proof is in Ukraine.
You don't need as many big expensive air fields. Training pilots is expensive. Buying and maintaining aircraft is expensive. Support personnel cost. Smaller nations, even developed nations like Denmark, Belgium, Norway can only afford to buy a handful of new multi role fighter bombers at a time. F-35's are almost unreachable in price. For even smaller nations that cannot afford air forces like the Baltics, drones can give them an air to ground attack capability they didn't have 5 years ago. It puts them in the game at least in a small way.
On the plus side every infantry unit can carry a cheap drone for scouting.
Drones are not yet replacing fighter aircraft in the air to air role although that may happen someday. But for tactical air to ground they are rapidly making whole classes of attack aircraft obsolete (A-10's, attack helicopters etc.) for everything but the highest intensity warfare. And even there you can do a lot of damage with a lot of attack drones on your side.
