I have friends who breastfed for a full year and others who went straight to formula.
There was a time before Ellie started sleeping through the night when I decided to supplement with some formula in order to keep up with her growing appetite and to give myself more sleep at night, and this worked great for us. I have friends who breastfed for a full year and others who went straight to formula. They all have happy, healthy, and thriving babies. Fed is best, no matter how you go about it!