“Soviet technology is already in Western countries” Well yeah, because East Germany is Germany, where else should the vehicles go? Besides that the rest of “Soviet tech” is either in badly implemented subtrees or premium vehicles.
before any 5th gens come we need the folliwng things:more 4.5 gens(f15EX,J16,SU35,SU30SM2,KF21,euro fighter tranche 4s/3a,rafale f4,j10c etc etc…), we need ecm, we need much larger maps like 500km * 500km maps would be great,next geranrtion bvraams( aim120D-3,pl15,r77m,r37m,meteor,pl17 etc etc…), next gernaration wvraam ( asraam,python5,aim9x block II/III etc etc…),aerial refuling,functional datalinking( imagine u can fire an amraam then you can go cold immediatetly as u pass datalink to you teammate ),awacs,more unique game modes and maps . bassicaly the game has allot to introduce before we can see 5th gens
KF-21 initially is a 4.5th generation aircraft. Only later Blocks that from what I understand don’t exist yet will receive internal weapons bays and more optimised stealth performance to become a proper 5th gen.
I could see ECM in some way happening as Gaijin did hint at wanting some new features before 5th gen as well.