When I say that it is because I make quilts that I want to make. The only way they could become heirloom in my opinion is to not use them and store as museums would store them. Not gonna happen. The ones I have given away get the daylights washed out of them. They are washed as often as bedsheets. Most people don't want to take proper care of them.
I make quilts because I love all the process and I'm trying to use up my stash and fabrics. I bought it for me to use. My oldest Daughter and oldest Granddaughter will have to decide what to do with the many,many ones I leave behind.