You use k8s to manage the machines where wasmCloud runs, and wasmCloud to manage the WASM apps that run on top of it. That's at least my understanding.
We've got a few examples on our website from users that (in my opinion) use wasmCloud more for its strengths as a distributed computing platform. Often there's central k8s infrastructure where wasmCloud runs and connects to wasmCloud hosts running on edge devices. https://wasmcloud.com/blog/2024-10-22-webassembly-adoption-t....
Me personally, I run all my side projects off of a wasmCloud binary on Oracle's always free tier instance and it's been pretty awesome.