It didn't fail imo - it was intended a low-volume product for next-gen Tesla tech - Ethernet based fieldbus, 48V systems, area controllers etc. The philosophy is the same like other high-end cars - you field test your latest experimental tech first in a car with lower sales but high margins - if your fancy stuff has a 1% failure rate, in a 100k production run, that's 1000 vehicles - high but manageable.

If you sell millions and its your main product, your company is over. This is the same playbook German manufacturers followed since forever. I bet the next gen Model 3 and robotaxi will get the cybertruck tech.