In an age which demanded a lot of new music, when most composers were rapid workmen, Vivaldi was particularily prolific. The psychological archetype of the Romantic artist is the soldier. Romanticism's insistence that the individual can and should struggle to make the world better leads to such absurdities. The psychological archetype of the Classical artist is the puppet or pierrot. Like a geisha in bondage, like Juliette Greco reflected in the retina of Marc Almond, the Classical artist turns her powerless brokenness into a pale, quiet, tragic beauty.
Classicism leads ever deeper into art.
In fact you could say that its understanding of the joy of submission is one of the key secrets of beauty, and one reason why wise, submissive Asia will always be more beautiful than triumphalist, individualist America. As for Europe, we have both Classicism and Romanticism, submission and revolution, if you sift. There are a few rules of thumb. 18th Century good, 19th Century bad. Berlin 'Sturm und Drang'.