ADA Reddit Mentions | ChartExchange

No bank is going to trust trillions of dollar of transactions to some code written by AI. The cost of maintaining the Mainframes, Z/OS and COBOL along with the interface layers is literally less than a rounding error in their bottom line. Where as one bad chain of events caused by AI generated code could lose enough money to crash the economy of many small countries and possibly destabilize the world economy.
Having experience in COBOL development around the banking sector I can tell you just getting small COBOL changes live is a huge process generally requiring months of testing. Total time from change to final live was 6 to 12 months. Talking COBOL changes in the core critical apps. Interface layers where faster to fix. I think no one outside that industry really understands the amount of money that moves around the world based on COBOL running on Mainframes. They use numbers in the hundreds of billions and 10's of trillions like we normal folks talk about tens and hundreds of dollars. There is zero tolerance for error and nothing can impact the 99.99999% uptime of these systems.
You also are not accounting for if one bank goes forward and that changes the rate of transactions sent/requested to other banks they could overload the other banks that stayed on COBOL. This event has actually been written about because it happened before when networks make huge jumps on transmission speeds. Some systems were faster than others. Backlogs crashed systems. The old network speeds had been the throttle keeping it all running. Throttling had to be applied until everyone could handle higher transaction rates enabled by faster networking. It is not a Bank A can upgrade and everything will be OK. It is the entire banking system needs to make the move together or at least have a plan so one bank cannot crash the global system.
All this and you still have not addressed the safety, security, redundancy, and host of other factors on the hardware side. the whole ROI cost has to be evaluated. A CEO presented with X dollars to upgrade being equal to maintaining the status quo for the next 30+ years is going to take the safe bet and leave the problem for the next guy. how do I know this? because previous CEO's have already done this before and that is why the industry is running on COBOL in 2026.
And this is just the banking industry. Yeah COBOL and mainframes are a bigger issue than just having an AI that can convert COBOL. It is now a global problem across multiple sectors. AI just can't solve this problem of scale yet.
Sad part is after we do get done with COBOL code there are 100's of billions lines of code in ADA that needs to be addressed as well.

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