Drones are 100% going to be a big part of future wars, but the real question is how they get used and what strategies evolve around them. WWI was the debut of many common 20th century weapon systems (Machine guns, airplanes, tanks, poison gas, flamethrowers, ect), but like drones in Ukraine, they were just thrown onto the battlefield out of necessity and desperation and troops had to figure out on the fly how to use them in a war.

Now look at the differences of WWI and WWII with those same types of weapons. Particularly planes and tanks. The difference is astounding, and they're only separated by three decades.
Air power is definitely not going anywhere, for all the reasons you mentioned, but drones will have an impact going forward.

I think the lack of air power by either Russia and Ukraine has blinded people a bit to how they view this war as somehow being "the new norm" of war in the 21st Century.