Manslaughter is the unlawful killing of a human being without malice. It is of three kinds:
(c) Vehicular—
(1) Except as provided in subdivision (a) of Section 191.5, driving a vehicle in the commission of an unlawful act, not amounting to a felony, and with gross negligence; or driving a vehicle in the commission of a lawful act which might produce death, in an unlawful manner, and with gross negligence.
(2) Driving a vehicle in the commission of an unlawful act, not amounting to a felony, but without gross negligence; or driving a vehicle in the commission of a lawful act which might produce death, in an unlawful manner, but without gross negligence.
(3) Driving a vehicle in connection with a violation of paragraph (3) of subdivision (a) of Section 550, where the vehicular collision or vehicular accident was knowingly caused for financial gain and proximately resulted in the death of any person. This paragraph does not prevent prosecution of a defendant for the crime of murder. [0]
[0] https://leginfo.legislature.ca.gov/faces/codes_displaySectio....
Silicon Valley doesn't think anything different from that and doesn't expect to be treated any differently. Jailing engineers would be the different, weird thing.
Engineers can and should go to jail for negligence but that is an entirely different standard than criminalizing mistakes.