True. But while avoiding vendor lock in is a worthy goal, it does have its costs - as in you are now on the hook for duplicating various functionalities that may not work as well together.

For example, let's take a simple producer/consumer system with some sort of queue. That's an easy enough problem. But add in some additional requirements:

* Data encryption - both in transit/rest * Access control * Audit logs

And it becomes much more complicated. It is a trade off. But the productivity gains available by having a common consistent solutions to issues like this... shouldn't be underestimated.