Final answer:
The challenges to concert performances during Beethoven's time included changing public taste, the rise of nationalism, and acts of violence.
Step-by-step explanation:
The challenges to concert performances during Beethoven's time included changing public taste, the rise of nationalism, and acts of violence. Other composers like Berlioz, Strauss, and Wagner were pushing the boundaries of music and challenging the audiences of their day, which led to a decline in the popularity of Beethoven's music. Additionally, during times of war or political unrest, certain composers and their works, including Beethoven, were marginalized and not performed.