The Cybertruck wasn't really designed as a volume item, it was designed as the testbed for Tesla's next gen tech (ethernet-based fieldbus, 48V tech). You can do only so much in the lab, and sometimes you have to push your tech into production to find the last few% of failures, which will cost you dearly if you actually put them into your volume sellers.

I mean it's probably not that comforting for owners to unknowingly have signed up for a beta test, but that was the plan for Tesla for a while with the Cybertruck.

This was also the reason for sloppy stuff like steel panels glued to the aluminium frame, and not following up on their initial promises - the car morphed from a serious project into a low volume testbed sometime during its production.

Tesla seems to be killing its non volume cars the S and X are dead as well, I've heard rumors the Model 3 might be on its way out.