Here is follow-up blog post for – https://wethypeople.wordpress.com/2020/02/07/first-principle-vs-incremental/
URL from CNBC has insights from Elon Musk – a champion advocate of “First Principle” – on way to think, break down problem to its fundamental core and not incrementally as there could be some built in assumption in incremental thinking – which can change over time or were actually variables.
Trying to understand each component to further break it down or find it’s lowest limit – is biggest challenge and therefore it is time consuming process as well difficult due to domain expertise required.