Bach wrote for “Klavier” which is a generic definition that may or may not include the piano. We know that early in his life he hated pianos, but later on he ch

Bach wrote for “Klavier” which is a generic definition that may or may not include the piano. We know that early in his life he hated pianos, but later on he changed his mind and even started selling them (he worked as an agent for a piano maker). So, at least for his later works, we could argue that indeed he did write for piano.