“Solo play is in its final stages of testing as we fix the last issues that remain. We aim to release this at Launch. If not, a patch shortly after that in December.”
The exact quote from Community Update #1
There’s also this from Steam back when Hedge was a staff member.
At some point solo mode went from “in the final stages of testing” in November 2022 to the following nearly one year later:
A feature does not go from the final stages of testing and ready to go live by next month to “not a priority” in a year without reason.