NOLA and Detroit are two different cities so it's hard to compare the two. NOLA is still 1/3 white and these white people don't seem to be going anywhere soon. NOLA is still a tourist destination with a little over 9 million tourist a year. NOLA is still a center for music and the arts.
The biggest thing Detroit and NOLA have in common is a city council which is trying to ruin the city.