Modern systems are complex generally. If it's not Kubernetes with YAML files, it's a bunch of servers in VMware which is own ball of wax followed by extensive Ansible/Puppet/Chef setup and SREs who keeping entire architecture in their head since they don't have time to write it down.

Obviously, there is exact opposite with stuff like fly.io but they can be extremely constraining.

You will be happy to learn that it was not in fact downvoted at all. I think this may be the first time I've expressed this sentiment to (mostly) positive feedback and I'm pretty sure it's because it was explained properly this time. That is I think a good thing - the downvotes that came before gave me the impulse to improve, and I was rewarded when I did.