WeWork had about 1500 engineers at its height (the rationality of that is a separate discussion). At that scale the limitation isn't having to maintain some tec

WeWork had about 1500 engineers at its height (the rationality of that is a separate discussion). At that scale the limitation isn't having to maintain some technology but rather decoupling interfaces so communication and bureaucracy doesn't block engineers from getting work done. You can use Postgres but then getting access, schemas, resource management, coupling, and so on become the limiting factors on usage. Paying for 5 more engineers to maintain Kafka and unblocking 50 in the process is a net gain.