Absolutely. I am thinking that a reasonably efficient system can be built with that 100 million put in a bank and pay the interest (4%, 4 million), to about 10 - 15 developers and use standard practices and open source systems for a custom erp system.

But I guess the reason products like SAP survive is because in a corporate environment, people have the "No one was fired for buying IBM" mentality.

If an SAP implementation is thrust upon the organization, then there will not be anyone particular to blame. Just the 3rd party devs perhaps.

I suspect the startup graveyard has many tombstones throughout the decades engraved with the words "We tried to disrupt SAP".