As i remember you refused to accept this once in an argument with me and Kunal. Moreover Arjuns system failure was not such a big issue becoz it was an tank under development and T-90 was off the shelf tank which we dont expect from and yet that was over looked.
The problem is you still don't understand, it was a teething issue. Meaning, if that one problem was fixed, it will bring the tank back to where it is supposed to be. The issue here was tropicalization. This isn't a problem that affects only India, it is a universal problem.
An off the shelf system will have more such teething issues. Considering the biggest issue was only tropicalization, it isn't even a failure to be concerned about.
For eg: The problem with the boilers on Gorky was an unacceptable failure. If the problem was just fixed by using a different blend of fuel, it would have been a teething problem. So, you see the difference.
The T-90s did not see any change in hardware because of the failure, it was only more hardened to the environment changes, that's all. It is entirely different if Catherine was replaced with a different system. That counts as a failure. Hardening could be as complex as changing electronic circuitry or as simple as adding another fan to the system. In the defence industry, both changes are not particularly expensive.
Compared to this small issue, Arjun faced issues that counted as major unacceptable failures along with other deficiencies. They were eventually fixed, but if you think IA would have gone for a half baked Arjun in 2000 simply because T-90 had such teething issues, then you are completely and hopelessly wrong.
Arjun's failures were a big issue, they were not anything small. It's like saying F-35's issues are small because it is still in development, nobody is buying it. Heck, Arjun underwent a major hardware improvement program in 2005, with the help of the Israelis. It wasn't even a tank at the time the T-90 had finished its entire development cycle was only having post induction teething issues. Arjun was just a big box, very similar to what Ajai Shukla quoted around the same time when describing Arjun.