Azure might also require special precautions. Honestly, I've seen Azure have a lot of networking issues, for example. But this is based on scuttlebutt and limited personal experience.

I've found that on GCS, certain workloads benefit from a dedicated node pool. This gets them their own CPU and RAM and volume I/O. Yes, I could imagine that there are shared Kubernetes control plane resources that might be affected, but I haven't seen that with any of our workloads. It might get more complicated if you have lots of in-cluster networking.

But none of this is my area of expertise. I just think that Kubernetes can mostly be pretty pleasant in practice for companies that have outgrown PaaS offerings like Heroku and Render.com.