Exactly my point and unfortunately there is absolutely no will from ED to do modern russian planes as realistic as possible, even if it is not 100%.
The lack of information is just something they hide behind, especially since the players are more focused on the accuracy of flight models than the accuracy of electronic systems and the sensitive intel is about the systems. The flight model is displayed in airshows, not the accuracy of radars or the range of effective jamming.
They prefer to do the guesswork with modern US missiles to shoot down 80s russian planes.