Because someone hasn't optimised their program. There were updates to LOD in SU3 which other developers addressed (whom have much more geometry in their cabin than Seated Passengers) but not Umberto.
Why you keep repeat this, when I clearly explained there's nothing left to optimize and we are as optimized as ever ?
There hasn't been any "updates to LOD" in SU3, the new LOD curve has been added in SU4 and OF COURSE, with today's update, we updated ALL LOD for ALL GSX Vehicles, because the new LOD curve is more
permissive and, since lots of users don't like pop-ups, we change all LOD tables for all vehicles to be MORE visible ( = LESS "optimized" ).
All vehicles in GSX has been updated to follow the new LOD curve added with SU4,
but NOT Seated Passengers, because they are extremely well optimized, with multiple LOD levels, and if we used the new LOD curve on them, the fps impact would be much worse, because the new LOD curve is allowing to draw MORE polygons before flagging a red error and eventually kill the object. If we used the new LOD curve with Seated Passengers, we would force the sim to draw a lot more of polygons.
The other mistakes in your statements are:
- we should "optimize their program", indicating you don't seem to understand that Seated Passengers are NOT "in the program", they are part of the airplane.
- other developers addressed "much more geometry than Seated Passengers". Make a proper example, and we'll see of this "much more geometry" is JUST static geometry, or under a Visibility condition, because what you keep failing to understand, is that issue is, is the SIM that is not as effective as it was until SU2 to completely ignore attached objects that are invisible having failed a Visibility condition.