I think it's also true that different pianos bode well for different repertoire sets. I think Chopin is played well on Steinways because Steinways have heavy keys, meaning that exercising the full freedom of dynamics works out better for when you want to make very, very soft notes and then soft notes and then roaringly loud notes. I'm no Chopin's Ballades-level pianist but playing Steinway at the piano store I do find this to be true.