[AeroNotix]

I think this mostly comes down to whether applications can handle downtime if their workloads are restarted, scale up/down based on demand.

It happens shockingly often that applications only support working with a single replica and even worse when those applications cannot run concurrently with replicas of themselves which prevent smooth rolling updates.

IME if applications are fault tolerant of restarts, or support concurrent replicas then scaling up and down to meet demand is absolutely fine.