Processing does not work how you are imagining it. EODAS won't get a boost simply with more processing, at best you can upgrade your MFD from 1K to 2K or 4K. It will only benefit GUI.
EODAS is one of the areas that requires a significant baseline to be present and the lack of processing power was one of the main reasons why a lot of planned capabilities could not yet be implemented. Right now they're basically just streaming the video from DAS into the Helmet...it shows that the proof of concept works, but that's nothing tactically relevant in of itself.
What they eventually want to do is to use the data from DAS + EOTS + Radar + Offboard sensors to create a Virtual 3D world, one which is actively interactable (so VR + AR), and they must render all of this in real time, so that the pilot can zoom in on any terrain feature and observe it not only from his perspective but in 360*. The processing power requirement here is SIGNIFICANT. These capabilities are yet to be implemented.
But yeah once Block-4 is in place, it will reach a level where the processing need is saturated as least as far as the GUI is concerned.
That still leaves EW though, where you need every bit of processing power for both offensive & defensive needs. The days of just blasting the spectrum with energy in the hopes of drowning everything out are past when it comes to the F-35. There's a reason the Program Office remains unconvinced that it needs the NGJ.
They plan on the F-35 being able to see & record an enemy radar (including AESAs), crack the algorithm its using to frequency-hop, and carry out focused & targeted Electronic Attacks at specific frequencies at specific times to jam them. It's a far more energy-efficient way to perform EA and if the guys in charge of F35 Program have their way, it will never have to carry an external pod ever again.
There's a reason that 2-year replacement cycle for socketed components has been put in place throughout the program's life. They really do foresee a need for a rapid & continuous increase in processing power to achieve the F-35's mission goals and keep it ahead of emerging threats.
And this will be true for all new Western fighter programs as well.
Russian jets also get very frequent processing upgrades. It's not 10 years. It's 4 years.
When was the last time you saw a Su-35 get a processing upgrade?
The mission computers on our Su-30MKIs were changed ONCE throughout their 20-year service history with IAF...and both of them (the original & the upgrade) were actually Indian-built because the architectures offered by the Russians sucked.
We plan to replace it as part of Super-MKI whenever it happens...but its already been over a decade since the last upgrade. So yeah, a 10-year replacement cycle even for socketed components. And a 20-year cycle for the Architecture replacement.
Granted, unlike F-35, the Su-30 or Su-35 do not have the capabilities that would actually even benefit from a 2-year cycle...but my point is neither does the Su-57. Like I said it basically has the same cockpit & mission computers as the Su-35S and Su-30SM.
It won't stand a chance against the likes of F-35 in an Electronic environment.
It will take them at best 2 years to replace their upgraded Cold War era relics with more upgraded Cold War era relics. Their peacetime upgrade potential for tanks is 500+ a year. They can double or triple that in mere months. The Russians have 7000+ T-72s and 3000+ T-80s stored away.
Production too can be scaled up very quickly compared to peacetime production by many times in a matter of weeks. Their SoEs run only at 20-30% capacity. In case materials like electronics need to be imported, they keep a massive stock of that beforehand.
Most of the Russian 'reserves' are eaten through, cannibalized or have their parts sold off by those in charge for a quick buck. The numbers look good on paper but in reality the situation is bad.
We already saw how they had to dig into the reserves of T-62s to be used in Ukraine. Because most of the modern kit on T-72/80 reserves was either cannibalized already or scavenged off.
We'll see how good their industrial spiral-up goes, I don't have very many hopes. Low tech mechanical stuff, yeah probably they can build again. But like I said, most of the inputs you need to build high-end stuff is gone.
You may smuggle computer chips, not as easy to smuggle a CNC machine.