@bonkers It's called z/OS these days. I don't know if our ERP is running on literally that, but if it is not, then it is still software and people that are running on the same protocols and mindset.
Lots of meetings and forms and approvals to get anything done, and everything relies at some point on some weird mechanism from the 70s or 80s that doesn't play well with "can we get an API to query this" or "can you make it post it to this API", all integration is file transfers or emails, and file transfers happen over obscure mechanisms shielded in bureaucracy.