As a business, they uniquely leverage inefficient and clunky design to drive profit. Simply because they haven’t documented their systems sufficiently, it is “industry standard practice” to go straight to a £100/hr+ consultant to build what should be straightforward integrations and perform basic IT Admin procedures.
Through many painful late nights I have waded through their meticulously constructed labyrinth of undocumented parameters and gotchas built on foot-guns to eventually get to both build and configure an SAP instance from scratch and expose a complete API in Python.
It is for me a David and Goliath moment, carrying more value than the consultancy fees and software licences I've spared my company.