Working on various teams operating on infrastructure that ranged from a rack in the back of the office, a few beefy servers in a colo, a fleet of Chef-managed VMs, GKE, ECS, and various PaaSes, what I've liked the most about the cloud and containerized workflows is that they wind up being a forcing function for reproducibility, at least to a degree.

While it's absolutely 100% possible to have a "big beefy server architecture" that's reasonably portable, reproducible, and documented, it takes discipline and policy to avoid the "there's a small issue preventing {something important}, I can fix it over SSH with this one-liner and totally document it/add it to the config management tooling later once we've finished with {something else important}" pattern, and once people have been doing that for a while it's a total nightmare to unwind down the line.

Sometimes I want to smash my face into my monitor the 37th time I push an update to some CI code and wait 5 minutes for it to error out, wishing I could just make that band-aid fix, but at the end of the day I can't forget to write down what I did, since it's in my Dockerfile or deploy.yaml or entrypoint.sh or Terraform or whatever.