Well summarized. Also, the area of experience matters. I myself for instance have become pretty good at designing systems and infrastructure both from scratch

Well summarized. Also, the area of experience matters. I myself for instance have become pretty good at designing systems and infrastructure both from scratch up to corporate level. However, that will not help me too much when it comes to mega-corp level (think: FAANG) and other things such as designing public opensource libraries. (libraries and systems/applications require very different tradeoffs).