FS2004 is old. It crashes. Here are the top three fixes for addon-related crashes.
If you are looking for VR headset support and live weather radar, close this article. Go buy MSFS 2024. fs2004 addons
The primary reason simmers stay loyal to FS2004 is the library of aircraft. Because the platform had such a long reign as the market leader, developers pushed the limits of what was possible. Here is the breakdown of the aircraft categories. FS2004 is old