I worked on one of those &quot;opaque&quot; stacks, and as you can imagine, I disagree. Not least because everything we develop is done in the open.<p>As a developer, all I care about is that the code I tested locally and that passed on CI runs the same way in production, without further thought or effort.<p>As an operator, all I care about is that I don&#x27;t get paged when a bad piece of dev code rampages and chokes the shared resource.<p>PaaSes have solved this. There&#x27;s just no reason left to roll your own.