The planned acquisition of additional MIG-29 and SU-30 MKI are not related to the recent events at the border. The acquisition was initially reported in Aug 2019 and meant to be finalized at the Indo-Russian intergovernmental commission on military industrial cooperation held in October of that year. The MIG-29s are surplus used Russian equipment being offered at very attractive cost which would be upgraded to the
. The SU-30 MKI acquisition are simply replacement for losses incurred in recent years.
The stories floating around regarding the potential acquisition of Western equipment like F-20 and F-18s are merely suppliers pushing their products in view of a fighter gap of 110 units in the IAF acquisition program to get to 41 squadrons..
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Currently there is no traction with the IAF of such Western acquisition (discounting the 36 Rafale). Recent developments with the IAF suggest the plan is to go local by way of its MRCA program. I think such a move is highly risky given India's poor record especially with indigenization. The root of this fighter gap can be traced to its decision to drop the FGFA program.
Clearly the IAF is in a difficult spot with no clear pathway of making a generation jump with its fighter force. The upgrade path with the SU-30MKI is limited by Russian technology in radar and electronics.