I suppose this all comes back to the point that nobody is pragmatically advocating for absolute anarchy - it's simply a valuable concept to reference as we collaborate to build actual, functioning social systems. Or, at least, that's how I tend to think about it ¯\_(ツ)_/¯
Once hierarchies solve the issues they are born from, they cease to be necessary. Hence a government that permanently solves poverty and thus crime in the most common sense, eliminates the need for an authority to regulate interactions between individuals.
There will still be a non-zero amount of hierarchical order within social systems even if it doesn't come from the government.
I just wanted to elaborate (since I agree) on your point that Anarchy is "a valuable concept to reference as we collaborate to build actual, functioning social systems".
I won't exclude that Anarchy could eventually concretize though, who knows!
I tend to speak this way because I lean towards discussing near and mid-term futures as opposed to longer term ones in many conversations for a number of reasons.
I do this in part because I'm biased toward the now both subconsciously and out of pragmatism as a material being living in the present, but also largely because I find that other people I encounter tend to be even more that way and struggle to envision the longer-term possible that may require a number of intermediate steps.
Anyway, to our future, voluntarily!