[hinkley]

If the number of servers needed for service A is proportional to the number of servers needed for service B-Z, then your whole cluster scales up and down together and you have a situation where the max cluster size is hit regularly instead of almost never. For private servers that’s a big problem. But if you’re a large enough customer for a cloud provider it can still be a problem.

You save money still, but you don’t solve your capacity problems by doing so.