From experience, I think this is absolutely true. One of the reasons for the 80/20 rule, specifically that it takes 20% of the time to make 80% of the product

From experience, I think this is absolutely true. One of the reasons for the 80/20 rule, specifically that it takes 20% of the time to make 80% of the product and the remaining 80% of the time to make the remaining 20% of the product, is that we perceive most of the accidental complexity to be in that final 20%: technical debt, localization edge cases, bugs, misuses that turn our products into spying tools, etc. I think that accidental complexity isn't a software paradigm limitation. It's a human thought limitation. It takes time for human organizations to learn how to handle the inevitable yet unanticipated issues and exceptions to the rule, and it takes time to turn them into processes and then to automate them.