Some people think using the autoclave ensures better quality of the final composite. But autoclaves are really expensive. It is basically a high pressure chamber with an oven. The larger the part you want to make, the larger that high pressure chamber will have to be. Doing it out of autoclave means you only need the oven, which is much cheaper.
It is basically a lot easier to scale up the size of parts as well as production facilities with the out of autoclave method.
It is basically a lot easier to scale up the size of parts as well as production facilities with the out of autoclave method.