[candiddevmike]

Arch changes too much, and change means risk. In my opinion, for production, boring is always best. If the latest flavor of X is absolutely essential for the business, there are typically ways to get it for most LTS distros (back ports, third part repos, etc).

[moistbar]

It also changes in ways that can make it hard to automate deployments. For instance, the base package group used to include a kernel, but no longer does.