The Sonic Loser will never get off paper. It's going to be noisy and without afterburners it's gonna need a runway that is 25,000 ft long to get to the speeds a delta wing needs to get to for LOF.
Now I bash the A380..... It will never pass passenger evac requirements and they will never let them do the requirement by analysis. Especially after the EU regulators made Boeing add overwing escape doors on the 737. It will make a decent freighter though.