The UI is simpler because the product is simpler. If all you want is 1-2 VMs in the cloud and to not think about the rest, its great. For any actual business that's moved from 'hobby'/'seed' phase, its not the right platform.
For great many businesses way past the "hobby" stage, a managed DB + managed queue + managed cache + a few VMs under managed k8s + serverless functions is plenty enough. Given a right architecture, this could serve a million paying customers. When you have more, you usually have the resources to consider a more elaborate setup.
I'd say that for most businesses 3-4 VMs, or a couple of bare metal boxes, is already enough, unless they grow explosively.
