Dude, IAF never asked for an open architecture platform and not even for customization. It is the russian offering an open architecture platform. Americans, french and swedish are also offering customization but no one except Russian are offering open architecture platorm, why so !!! It will take almost an decade for IAF fill such short-comings. In modern world no combat aircraft has an open architecture. Only the planes that don't have developed electronics/avionics offer such facility.
Russians offering open architecture only shows that they are not interested in completely developing the plane. After such behaviour how can we be assured that russia will be self intrested in upgrading the aircraft. If we select Mig the we would have to pay russia to develop technologies for upgrade. The cost of upgrade would be different. Tell me a thing why should we pay/finance russia for their technological development.
Compaired to western counter-parts russian EW equiment is inferior. This was the reason why we Su-30's EW suite for changed by IAF. EW pod was imported from israel, RWR was replaced by indian one and the software programming for EW Suite was rewritten by DRDO. The MC and RC were also replaced.
The fact is russians lag behind in field of electronics.
not true , when IAF bought Su 30MKI , it asked for open architecture because India was itself developing EW suite called " mayawani " and " Tarang " , India wanted to instill its own system in Su 30MKi , it is an opurtunity to integrates indeginious system in the aircraft . after this Mig 35 is also offering open architecture because it suits Indian needs plus IAF will modify any aircraft for that matter , be it SH Rafale OR EF , Do not doubt the ability of Russians in avionics for example In 1998 the crash of YF -22 was because of failure in fly by wire system , where as when Su 27 was in development russians has saw that probelm comming therefore were able to solve that problem in Su 27 , so that it self speak of the ability of Russian electronics school and if that is not enough
have you heard about Buran Space Shuttle , it had launched , orbited the earth , landed ( with wind comming 40 degree to the runway ) all by itself ie automatic , and that was in 1980s . that itself speak of russian electronics system , and Buran has 12 kb of memeory , NASA is not able to do the same after spending millions of dollars