Why not retractable screens?

I don't understand why so few people have retractable screens? Mine is 9 feet high 16 feet wide in my garage. It's so wide i can't hit the walls of my garage and then it retracts and leaves me with the exact amount of storage space.

plus it's cheaper: 800 for my screen and 800 for my retractable mount/motor.

What am i missing? i really enjoy mine