I agree - I&#x27;m building a huge application on Postgres because of it has amazing capability and yes because it&#x27;s Open Source.
Doing the same on ms sql server or oracle in my case would be madness - because of their insane per core licensing costs for enterprise features which I need.
However for my tools, I&#x27;m not bothered so long as a reasonable price or free MIT - in fact I&#x27;d rather pay for a commercial license than use a risky GPL license.
I do feel sorry for Architects (my wife) though, they have to pay outrageous prices for design tools, literally thousands yet developers who earn far more than architects, bleat about trivial amounts such as $70 for ST.