(Psst! It’s the SOFTWARE!)
how we talk about the big thing that includes the necessary narrow design practices
It is not just that the names of these design disciplines are not clear, it is that we lack a shared understanding of what the elements are which need names.
THIS is my new name for what I do, and THIS is what I mean by it, and I will defend BOTH pieces of territory
(There is the design domain of UX, the UXD which a system has, the UXD work which goes into creating it, UXD considered as a community of practice, UXD misunderstood as a skill ...)
We are starving for a way to talk about the big thing, and every attempt to claim one ends up getting ground narrower and narrower.