The option has always been there with cupcake machine but I haven't had a sim make cupcakes or muffins in months so I didn't know they can now get that option with a regular oven. That is very handy since the original cupcake machine isn't handy. It's like the telescope and microscope, they take up acres of space. I have a cc cupcake machine from SimCredible that is a modded kitchen counter so it can be used without needing an entire room dedicated to making cupcakes.
If the sell to bakery option has now been added to ovens, like it should have been from the beginning, that makes work from home bakers a much more viable option without having to sacrifice space on small lots.
Edit: The option to sell to bakery is still tied to the cupcake machine in my game. I was just in there working on a story and thought I'd give it try. I have the London's Choice oven and no option to make anything but bread and bagels, and no sell to bakery option. Bummer, but I still have my cc options.
And I forgot one cc option, Ravasheen's a-dough-able cupcake machine which is cleverly disguised as countertop clutter.