Much of our current inventory- Mig 21, Mig 27, Mig 29, Mirage 2000, Jaguar will be phased out in the next 10-15 years or will be extremely long in the tooth to be relied upon as frontline fighters..
We'll be left with Su-30 MKI (~270) + Rafale (if the deal is signed 36) + LCA (120+) + AMCA (If...