> they were disregarded.

As were the Partitas and Sonatas for unaccompanied violin. It wasn’t until the great 19th century violinist Joachim began playing them in recitals that they came to light again. Even then it was not widely accepted. I believe it may have been George Bernard Shaw who had pretty harsh words to say about the very idea of treating these works seriously. My daughter is preparing for her conservatory auditions; and these works are now compulsory literally everywhere!