According to Western Military Watch (MWM), India can be modified by the plan to buy Russian generation 4 ++ SU-35, priority for the Su-57 due to the ability to transmit the entire technology completely later.

The article noted that Russia has proposed quickly replacing the MIG-21 and MIG-27 outdated with more modern Su-35.
Most likely, India implemented the program to buy and licenses the production of fifth-generation fighters, Su-57, the ability to be discussed in the Ministry of Defense (India) in February.
MWM emphasized that the production speed faster and the presence of Su-30MKI activity, similar to the Su-35, are the advantages of the Su-35 compared to the Su-57. The publication shows that India can choose the Su-35 according to the latest weapon supply and the system on board.
Read about the topic: Military Watch Magazine: F-16 will not be able to change the strength balance in the sky