I was thinking about that - Germany and Austria were, in a lot of ways, the center of culture, music and art. Those never really came back after WWII. 1914 was the end of the Classical Era in a lot a ways.
In America, the cliche of the music teacher with a German accent in every city was pretty much true. After war broke out, German culture lost some of its prestige and Russian composers like Tchaikovsky started to played much more.
Sir Edward Grey, at the time British Secretary of State for Foreign Affairs, is said to have remarked at sundown of the literal eve of the German invasion of Belgium “The lamps are going out all over Europe, we shall not see them lit again in our life-time”.
To be more accurate, he should have said “We shall not see them lit again in the lifetimes of our grandchildren’s grandchildren”.