There are a couple problems using the LCF for regular cargo. It takes special equipment to swing the tail and there are only 7 or 8 locations on the planet that have it. Airports aren’t going to want to invest in something that is only going to be used maybe once a month. And the main deck cargo area isn’t pressurized. So anything boxed up tightly may pop open. And finally the main deck cargo area doesn’t have a normal cargo roller floor. So you can’t just push a bunch of ULDs in. The 787 parts ride in special cradles designed for those parts.