Not only will you have a mature starter to make artisanal bread, but you can use the discard to make discard bread, biscuits, muffins, and pancakes! you don't HAVE to throw the discard away!
Flour choice shapes the bacteria in sourdough starters, even though the same yeast dominates across all types.
Learning how to make steam bread with baking powder is a convenient way to prepare soft, fluffy bread without using yeast.