I’ve never seen a SAP install that wasn’t modified heavily, usually to the tune of millions of dollars of development - which can’t help but make me think that if nobody can use it “correctly”, then perhaps it can’t be used in its unmodified form.

In addition, a common occurrence seems to be businesses paying for extensive custom developments (such as an integration with a third party system), and footing the entire development cost - despite their “custom” development being 100% identical to that deployed at other businesses. They’re then trapped in a world where changing the URI for an API endpoint costs €150k.

Honestly, I see it as just being a big corrupt hole fuelled by interpersonal relationships rather than any actual rationale.