Maybe you just don't get to know what problems it causes because they don't talk about it. Dual stack is currently under testing and afaik higher ups are not very happy about it.
Maybe we've done too early (it was about five years ago maybe, I don't really remember exactly) and now tooling is better, idk
Maybe we've done too early (it was about five years ago maybe, I don't really remember exactly) and now tooling is better, idk