Piano school dropout

It is breaking my heart a little bit. Today, Jack officially quit piano lessons. I swore I was not going to ever let him quit. I love that I can play piano and I wanted him to love that he could play piano too. And when I began my Tiger mothering practice regime last year after Christmas break he excelled so quickly. He was proud when he was able to play more difficult songs. We had this thing we could do together. But the guitar has been steadily creeping in for some time now. First it was just some added on guitar lessons from the piano teacher. Then it was real guitar lessons every other week. Now he plays lead guitar in his rock band every week, and soon we will up his guitar lessons to every week. And as the guitar creeped in, I saw the piano creeping out. He began to hate practicing piano and love playing guitar. I suppose in a way the piano helped him realize how much he likes guitar. I argued that he needed the piano background along with the guitar. But I began to worry that soon he would just see music as another chore, and turn against it all together. I really don't want that. And I really do love hearing him sing and play guitar. I am hoping to now watch him excel in guitar far beyond his piano studies. Soon I feel he will be breaking many more hearts as he belts out his love ballads with that guitar on his hip. And since I am his band manager, we still have this thing we do together. I guess I can handle that.