Because they also have to: give the hornet amraams and harm. fix the A-10C cockpit lighting. Fix the Ka-50 cockpit lights. get new clouds and humidity models working. fix the weird flickering on the MiG-15s fuselage when seen from the cockpit. give the hornet a TGP and guided air to ground munitions. fix VR for combined arms. optimize it to not shit itself after you ran two missions in a row. et cetera ad nauseam. I’m sure making tracks work better is on a list somewhere.