*I've worked on teams where multiple engineers argued about the "right" way to build something. I remember thinking that they had biases based on past experiences and assumptions about what mattered. It usually took an outsider to proactively remind them what actually mattered to the business case.*

Gosh I am so tired with that one - someone had a case that burned them in some previous project and now his life mission is to prevent that from happening ever again, and there would be no argument they will take.

Then you get like up to 10 engineers on typical team and team rotation and you end up with all kinds of "we have to do it right because we had to pull all nighter once, 5 years ago" baked in the system.

Not fun part is a lot of business/management people "expect" having perfect solution right away - there are some reasonable ones that understand you need some iteration.