Have to respectfully disagree here.
FS20 and FS24 are leaps and bounds ahead in realism when compared to FS2004. I am certainly not looking back with rose tinted eye glasses on. For me FS24 has been awesome. With the exception of a few minor bugs seen so far (1x pink AI aircraft - missing textures I assume, and three Airbuses superimposed over each other taking off at EGSS) I have been having a real blast with this game.