I have seen so many shit show implementations and good money being thrown at bad. And so often all they needed was a simple script to calculate commissions or send a document to next person in the approval chain.

I hate that he is actually right about this. SAP, Oracle, and Salesforce are general one size fits none solutions. Your going to spend a fuck ton of menu integrating these platforms into your work flow. Then spend more money maintaining the platform and on licenses. A janky home grown solution is better in a lot of cases