Even the companies that have $100M+ allocated for storage won't necessarily be able nor even want to hire the kind of developers that could create their own dat

Even the companies that have $100M+ allocated for storage won't necessarily be able nor even want to hire the kind of developers that could create their own data storage system in-house - they've already invested so much of their IT staff into buying into their SAN infrastructure. With most companies outside tech and $100M+ available for IT, they'll just send it to paying for better developers on things that offer better growth potential like big data analytics or whatever because IT is a cost center if your revenue does not directly depend upon reliability of your information systems, and with limited engineering talent available at non-tech companies you'd rather have them work on things that directly contribute to raising the top line. IT is about the bottom line until a business decides IT is not a cost center for them.