Here are my concerns:

With Kubernetes is that you need to pay for a few node just to keep it up, and then you need to pay for your nodes, no matter how much you use them.

Remember that Cloud Run charges based usage, so if a service sits unused for a while, which often happens in a heterogeneous microservices environment, you don't pay for it.

Also autoscaling is slow (Cloud Run autoscales really quickly, about as fast as your docker can be loaded and started, which for me is 1-3 seconds, where as I found Kubernetes auto-scales on the order of minutes) unless you over-provision, which is costly. This lets one scale to zero even without much of a hit.

I also ran into massive issues trying to get GPUs to work in Kubernetes - it was a driver nightmare that has wasted weeks of time collectively over the years. Whereas they are auto-provisioned properly on Cloud Run if you request them.

Lastly job systems on Kubernetes are a nightmare of configuration. The built-in scheduler cannot handle a lot of jobs but Argo also has its own issues if you actually try to use it. We've wasted weeks of effort on this. Cloud Run Tasks just skips this and is ultra fast too and handles scaling up to do a lot of jobs in such a simple fashion.

Honestly, managing Kubernetes is just overall a pain that has little benefit.

It is really hard to figure out what the benefits of Kubernetes is from my point of view. It has been a massive source of pain and costs and lost developer time.