Because your environments are too small and you have too many services. When you run a bigger site, a lot services are using entire boxes/VMs so it doesn't mak

Because your environments are too small and you have too many services. When you run a bigger site, a lot services are using entire boxes/VMs so it doesn't make sense to stack them. When you you have tons of systems, you optimize for easier management and debugging. You do not care about "wasting" some resources.