In the Star Trek The Next Generation Technical Manual which I obsessed about as a child, the authors (Rick Sternbach and Micheal Okuda, graphic designers on the show) go to great pains to emphasise grow things about the replicators: first, that they have limitations in terms of resolution, and that replicated objects are only ”approximately correct” (something that in-universe is referred to as ”molecular resolution”, so that they cannot run off and start replicating characters)m and secondly, that replication has a huge energetic cost (to foreclose on the risk that one might infer the capability to replicate whole starships at the press of a button). As such, I have never viewed the replicators as being ”post-scarcity” myself, but to have simply shifted the effective constraint to an energetic limitation.