Oh yes to be clear I definitely agree with the overall sentiment. I just wouldn't ever cite circular replication as an example. Basically saying "it's hard to do [inherently flawed terrible thing] on k8s!" just detracts from the argument :)

fwiw my team eventually automated pretty much "everything" for Facebook's database fleet, and it was hundreds of thousands of lines of custom automation code (non-k8s), many years of work for 10+ extremely experienced engineers. In a k8s environment I suspect it would have been even more work.

The open source mysql k8s operators are certainly getting better with time, but there's still a lot of stuff they don't handle.