To be clear my question isn’t claiming redis isn’t premature optimization, but rather asking why the op thinks that it is. Being new doesn’t automatically mean that there is no need for latency sensitivity. Making that assumption could be just as premature. Ripping something out that is already working also takes time and the trade offs need to be weighed.

Can't respond for them of course but I didn't take the impression that it was already fully implemented, working, and functionally necessary. I took the impression they had started going down that path but it was still easy to bail. That's just a vibe though.

But I agree that it would be appropriate to start out that way in some projects.