No, you are not too old to quilt... I am 73, mow my own lawn, clean my swimming pool filter, prune my bushes, garden, keep chicken and I still have time to quilt. I do the outside work in the morning, come in take a shower, a nap and then quilt in the evening. I also have a HQ16 that I quilt for myself, friends and others.
My daughter, who also quilts, comes shopping in my stash. We have discussed what will happen to my stash and my sewing machines (7).
O hope you don't think this is morbid but I want my son to make my casket lined with my favorite quilt and a rotary cutter in my hand..
So never give up, have fun doing what you like to do.