If you bake weekly it will save but you have to work it. If you just use it occasionally it will not retain the strength to give you a good lift for the lighter bread we are used to. In that case many people supplement the sour dough with some yeast. When I can bake a lot, I can run it without yeast but I give extra time to rise. I LOVE my sourdough for pizza dough and flat breads. When I am patient I love the depth that the sourdough has. I grew up with it and it brings many many fond memories. As a teacher my sourdough allows me to ease up during the busy times and just feed it and make some pancakes or pizza (pizza is a favorite at our house) and then during the summer and especially during the Christmas season, I can bake to my hearts content. Sourdough bread, english muffins, rolls, cinnamon rolls, heck even made doughnuts (kids didn't like em but I did).