Our target ought to be 2030 , like 2022 was the holy grail for RST & Avi Raina . Too bad nothing much happened as far as procurement goes & Paxtan wasn't split to pieces as far as 2022 went , with the result RST was reduced to special pleading exhorting us to consider emergency procurements.The su-57 is in a middle of an upgrade program. When it's done the su-57 will finally have a fifth gen engine with 3d thrust vectoring, 400km r-37(export versions are effective at 200+km).
It's the r-37m and we need something that can atleast provide problems to the j-20. Su-57 with r-37m will be problematic. And we do need aircrafts to replace the su-30mki's air superiority role. The AMCA will be too late. The f-35 won't be inducted in significant numbers to really provide a game changing effect. With the su-57 we can atleast keep the entirety of plaaf and paf's 4th gen inventory at a distance. The rafale with its meteor can't provide that effect simply because we don't have Rafales in significant numbers. The su-57 might not be good against the f-35 but against 4.5,4,3.5 gen fighters it will perform considerably well. And IAF had always kept it's options open regarding the FGFA. The main gripe of the IAF with the su-57 is the lack of stealthy engine on top of the mediocre stealth. But at 0.5 sqm RCS it pretty much can take out most aircrafts in paf and plaaf arsenal.
And once a supposed su-60mki/FGFA equivalent comes we can add new irst, virupaksha variant radar, astra mk3, rudram and many more munitions. The AMCA will enter service likely in 2035+ optimistically. So for the next decade we need some fifth gen fighters. The f-35 will be of limited use because of American restrictions on customisation. With su-57 thanks to its lesser sophistication we can go do a far deeper customisation and take those learnings and transfer it on amca mk2.
The su-57's radar can detect targets with an RCS (Radar Cross Section) of 0.1 square meters at a range of up to 90 km.
So basically everything from f-16,j-10,jf-17,j-11,j-16 can basically be pushed back around 150km in their airspace with the su-57/r-37m combo. This cannot be done with the meteor simply because we don't have the numbers and in case of attrition we don't have the option to license produce the meteor like the r-37m right now.
We're due for a showdown with China around 2030 give or take a year. Whatever we need to get ought to be in place by 2029 latest. Whatever comes after that won't matter much in the wider scope of things. This time 2035 , the worst would be over , one way or another.
This rules out pretty much most of the options we have like the Su-57. This platform needs at least 4-5 more years to mature. Besides however good this platform is , it's more in competition with Rafales as far as we're concerned than with the F-35 & the former enjoys a first mover advantage.
Had we not gone in for the Rafales we would definitely have considered the Su-57 which as of now is the best quasi 5th Gen FA in business. The Rafales would equal or surpass it with their F5 upgrades with the Su-57 undergoing their own upgrades to render it superior in 2040 . This cat & mouse game is eternal.
Besides the Su-57 is still a Work in Progress (WiP) FA . After burning their fingers umpteen times including with the MKI & the IN with the INS Vikramaditya & the air complement of MiG-29K , I doubt either entities are interested in WiP Platforms . Arguably that's one of the principal reasons they're not interested in the F-35 too among a whole host of other reasons.
Which in turn brings me to the much lamented MMRCA , MMRCA 2.0 / MRFA tender. Apparently MoD has been tasked by PMO to reduce the time taken to conclude negotiations & signing of an agreement with the vendor within 2-3 years of the AON being issued which in turn brings the MRFA back in biz.
However what does that say for the immediate future of the IAF particularly keeping the golden period of 2030 in mind is unknown. Perhaps we'd go in for another emergency purchase of 36 nos Rafales for the IAF directly imported from Dassault Merignac lines & combine the Rafale M order with say 72 nos Rafales for the IAF to be mfgd here .
Suffice to say we don't know what will transpire but whatever is to be expected will unfold in the next 2-3 months. Either way we'd know how the GoI is thinking & how they go about ameliorating the situation for the IAF.