We drink a lot of kefir, homemade and when we didn't have milk we brewed kombucha. Kefir is better IMO. No goats anymore but now we can get A2 milk. We always have a half gallon of kefir on hand for 2 people. Lots of health benefits.
I love kombucha and use that to make my starter for sour dough bread. I like Kefir but very time I bought it, it would mold up pretty fast.