Any thoughts on business models for Databases going forward? Some interesting recent developments make DBs a challenging vertical to bootstrap in a. Proprietar

Any thoughts on business models for Databases going forward? Some interesting recent developments make DBs a challenging vertical to bootstrap in a. Proprietary is a non starter, since increasingly large customers will insist on the source being available. b. Integration / Consulting is no longer viable since the cloud providers will likely offer a hosted / managed solution around a new OSS. c. Licensing is difficult to enforce if you are giving your code away for free. Will DBs join file systems and debuggers as pieces of the stack where the only way to build one is to be inside a megaco or as a side project? Am struggling a bit to understand how to monetize infrastructure software going forward. (I have ignored the option of raising $X M to build something and be acquired before shipping to a large customer base).