Dear IPACS team,
Compared to all the new aircrafts ,the 747-400 looks quite outdated .Newer aircrafts have more realistic sound effects and many more things .If the 747 ever gets a rework , it could be possible to add varients like 747-8 .I also noticed a possible missing part on the current 747-400 landing gear i am not sure whether it looks like that in real life too.