[lief79]

It's still there at the accounting/backend level. Automated Financial Systems Level 3 and it's replacement Vision are commercial loan systems.

LVL3 is pure cobol. It has been recently deprecated but there are many banks who own the code and are still self hosting it, along with it's IBM green screen support.

Vision is a java front end in front of an updated cobol backend. When your reputation is based on your reliability and long term code stability, at what point do you risk making the conversion, versus training new developers to work on your system.

https://www.linkedin.com/jobs/view/business-analyst-afs-visi...

[cyberpunk]

No, we are not afraid of our own systems. The idea that there is some fabled computer system which everyone is too scared to touch doesn’t exist (I work in payment processing). There are levels of controls way outside these systems which provide these safety nets (e.g settlement / reconciliation controls).

If the cobol is still there, it’s not due to risk. If anything, the cobol is a much higher operational risk than replacing it.

[lo_zamoyski]

Analogously, GDSes like SABRE still ran on mainframes until very recently (c. 2023) [0]. SABRE was written in some combination of assembly and some kind of in-house dialect of PL/I, if I recall.

[0] https://www.theregister.com/2022/04/11/gds_gets_over_histori...