The key thing I learned is that they were all very talented at what brought them success in their endeavors, but none of them actually made great developers within a company. In two cases, it became immediately obvious that they wanted to treat their job as a side project (that pays the bills) while they further expanded their book/course/open-source empire.
Being the author of popular educational material doesn’t necessarily make someone a great employee. It can actually present a significant distraction, which unfortunately can make it difficult for them to get jobs.
