[ghaff]

>Linux, Postgres, etc. All great! But have been assimilated.

If you're a company, you almost certainly want support, certifications, and related benefits of having a commercial product. And it's nice to have that avenue to fund developers. But the side effect is that the software is still free as in beer open source that anyone can download. In general, I'd say open source infrastructure software has won pretty thoroughly (even if not universally).