Why S. Cervisiae in your starter is not the same as bakers yeast

Toast

An interesting article which explains why the yeast within your starter differs from bakers yeast even though it's common to find the same species of yeast. 

https://www.the-scientist.com/news-opinion/humans-domesticated-yeast-through-bread-making-study-68256/amp 

I wonder why ?

People are surprised at how common 'bakers yeast' is and think it's interior if found in their starters. Truth is it was chosen because it's so common! Once something is domesticated it becomes different. Same when one domesticated an animal or even different types of grain. For instance wild einkorn differs to domesticated einkorn and same goes for all other wheat varieties and why they differ to each other. And what makes our starters sourdough is not only wild yeasts but the accompanying bacteria! 

Because they come from the flour, are kept in the flour, fed with flour, are part of a symbiotic culture with a multitude of yeast and bacteria, and are susceptible to change they aren't truly ever domesticated.

I think that’s a good point.  As long as the microbes remain in their natural environment, they aren’t domesticated.  True domestication in my book would be when they’ve adapted to unusual conditions to the extent that they are no longer well-suited to thrive in their wild habitat.