I would really like to see a major war just to get a grasp of where tech is at currently, yes I know its a retarded reason, but I feel like ukraine is too small scale. Hopefully the peace negotiations fail.
In the past decades shit like stealth bombers have seen little use outside of bombing iraqis, so there's really no knowing whether it would be effective against another advanced nation. I fear we're in a belle-epoque type situation, where the current strategies havent kept pace with the developments, meaning ww3 will be a shitshow.
tldr: total war and bombing brown people once in a while is good, actually.