My impression is that most teams have high enough natural attrition that it doesn't really matter and some teams even seem completely immune to any sort of real change, even if they do extremely poorly on their deliverables. I know a few teams that other teams actively avoid working with, even preferring to reinvent some of their solutions, yet, more or less the same people have been working on these underperforming teams for several years.

I’ve noticed this too in my time in my org, it’s reasonably common to just rebuild something simple if the other team isn’t responding to your tickets and escalations. The fact that they are three or four different time zones away from me on either side of the country doesn’t help.

I never asserted that Amazon's performance management system was effective.

(although I worked at a place that never fired anybody and I'm not sure I recommend that either)

To be fair, "regretted attrition" and "non-regretted attrition" are industry terms. Not Amazon specific.

I didn't know that, thanks!