This was an expensive exercise in spite, took a long time and a lot of people - and everyone knows it.
They could have done this far efficiently already if they wanted to scale out, but that company has too many conflicting internal priorities that they took a heck of a long time to move away to anything that scales.
They never try to invent things and if not Oracle, they'd use some other vendor built software. That is the true reality of this company.
So no, if you're thinking you're better than this company for moving away from vendor built software, you are mistaken. In the worst possible way.