I'm not sure where Rand was going with this, but I would articulate the line this way: "There is no such thing as sustained, responsible 10x engineering after

I'm not sure where Rand was going with this, but I would articulate the line this way: "There is no such thing as sustained, responsible 10x engineering after one achieves market fit." (How's that for sufficiently caveating?) It's easy to do 10x-engineering at an early stage, but it gets progressively more difficult as products/services emerge. And as those products & services are iterated upon to find market fit, sustainability and flexibility become more important. If every 10x-engineer also took the hippocratic oath, then we would be on to something.