Can I buy from multiple Artist Shops at the same time?

Each Artist Shop is completely separate. That means each Shop and the  shopping  cart is specific to that Shop Owner, and you'll need to place separate orders when ordering from different Artist Shops. 

However, we get that some people are lone wolves and some people are pack animals, so in the future, the Shop owner will have the option to add their Shop to a marketplace / shared cart, or choose to keep everything to themselves.