The problem is that when you do that you usually end up sacrificing something for one case or the other. In the case of Russian planes, they weren’t ever reall

The problem is that when you do that you usually end up sacrificing something for one case or the other. In the case of Russian planes, they weren’t ever really competitive on noise, fuel efficiency, range, or reliability. It’s why they (at least until recent events) switched overwhelmingly to Airbus and Boeing for civilian use.