Doing my first shop hop is how I first started my stash. I bought fabric from every store I went into. I was so excited to have a stash at last. Now I have such a big stash that my sewing room runneth over. I've given away more fabric than I can remember to get my room under control. But it's finally under control. And my stash is still huge. Welcome to the club!!
I don't have to buy another piece of fabric (except backing and batting) for the rest of my life and I can sew every day just fine with fabric left over. That's how big my stash is. And I'm in my 50s.