There are some interesting estimates here, but I can't square the idea of one programmer making a fairly low-stakes multiplayer game in two weeks with the amount of people I've seen working on projects elsewhere.
Just for example, I've worked as an artist on various small VR/AR projects that aren't anywhere near as complicated (just immersive experiences with limited interactive elements), and in those situations I'd be working alongside two programmers for 3 months to get the work finished, with one programmer doing more systems-based things and the other doing more animation-relevant things and technical art.
I can imagine that debugging something like the turning animation bug that required changing the NetUpdateFrequency and SimProxiesTurn() might take a couple of days to get around if it's a new problem. On the other hand, people obviously get faster with experience so maybe the time comes down again.
Maybe there are just too many factors here, but it'd be good to hear from anyone with concrete examples of things programmed, even if not multiplayer.
@stiff bluff I'd say that's impressive, I've been doing around 6 hrs a day, and it's been around 3 months so far but I'm only around 2/3 of the way through (I'm taking really good notes though).