[lamontcg]

I was responding to other commentors not really the title article.

The stuff you cite there is pretty simple to deal with, configuration management is basically a solved problem and IDK how you can't just fix the different hardware.

The more universal problem of making preprod look just like prod so that you have 100% confidence in a rollout without any of the testing-in-prod patterns (feature flags, smoke tests, odd/even rollouts, etc) is not very solvable though.