Well, larger engine RVV-AE (R-77) is out, and range is probably again in favor of R-77.You appear to agree with that. I will speculate and say that there is also a new guidance software in these new RVV-AE so that they can also fly high and get even larger range. After all, RVV-AE has been aground for 20 + years and I am sure there are software/hardware improvements that are implemented in current production.
So, if you have money, you can buy RVV-AE. If there is a need Russia will buy it. Which version of RVV-AE is going on a new Su-35 and Su-34 fleet?
This is just a negative spin on problems that every project and product goes through. First of all, there was no need to produce large numbers of RVV-AE.
Then, when it comes to problems, for example, we all see that F-35 is plagued with problems, yet we all know it will be produced in needed numbers as the time goes on. Same with RVV-AE.
Reminder: SAM = Stealth STOP!