Another frustration with the RPi cluster is the arm requirement. If you're only building/running your own stuff, that's fine, but finding containers and helm charts that support arm can be frustratingly difficult.

This is speaking from experience. I love my k3s RPi cluster, it's fantastic once you get things working. I just had to augment with some x86 nodes in order to _also_ run some software that just wouldn't run anywhere else.