does anyone really think that humanity will be here in 200 years? 500 years? I think that's a real stretch. There are 100 ways we will go extinct, and we don't care about any of them.
We might lose billions on the way but I don't really see why humanity wouldn't survive with 10 million people alive in 500 years assuming extinction level natural disasters.
For me the question isn't if there will be warm bodies around, but if they will have agency, dignity, a longing for justice and a capability for empathy, plus a lot of other things at least I associate with humans being human, rather than appendages of machinery that accumulates power without any use for it other than accumulating more power.