In my mind, BYOD is like being able to use my own iPhone or laptop to connect to some corporate network. I think of this "device" as a client and I think of byoc as being able to run some application or constellation of applications on my own device or in a vendor neutral way on some cloud like a podman compose or something similar... Like not dependant on a particular vendor's "native" capabilities

BOYD is corporate to me, BYOC LANs were common here

"BYOC" deployment plans often require more than just k8s. "S3-compatible object store" is the most common one, IME. Or other sorts of scalable storage systems.

("Why does the vendor not just include that in the k8s they send you?" Usually because it's easier for them to leave everything about physical storage to the env maintainers.)