Given how little it takes to post a message, perhaps it might be more serious than you suppose.
Besides, any responsible dev would know that the deadline was unreachable 2 weeks or probably more before the deadline, so it's more like 2 weeks and 2 days of no communication.
Alright, so this isn't a personal attack or anything. But those are silly points.
1) Dev has stated before that they struggle with posting for a number of reasons (this was years ago but I doubt the reason has changed)
2) You're treating this like they're a professional game developer (in which case I would probably agree with you by the way) but this is just one person,
one person who hasn't released a game in 9 years, it's very easy to underestimate just how long it will take, especially considering they're using a whole new engine from last time.
and 3) Lazycat basically made this point for me,
Another possibility is that it just feels more productive to put the time/energy into working on the game to release it instead of thinking of how to placate the angry people.
To be fair though, changing the huge main city map into smaller sections probably isn't an easy task (need to move triggers to each new maps, ensure the connections between maps are there, etc) on top of whatever was left to complete.
Dev had specifically stated that angry people like that were one of the reasons they stopped making games, it probably is far easier to just go "right, I've missed it, they're going to be mad anyway, may as well just keep making the game until it's done"
TL;DR, it's kinda shitty to hound a dev for updates when they haven't been around in nearly a decade. It takes a while to get the rust off, like, think about it. They haven't had to think about "updates" in 9 years, it's a fairly easy thing to forget if you're involved in something else.