I believe other manufacturers do use other sensors besides radar... but that's still a relatively pedantic question about the efficacy of a single safety featur

I believe other manufacturers do use other sensors besides radar... but that's still a relatively pedantic question about the efficacy of a single safety feature. It still isn't an apt comparison to the reportedly sloppy design of the Titan sub. If Tesla decided to make their suspension entirely out of carbon fiber despite knowing carbon fiber handles stress cycles differently and tends to fail catastrophically at the limit then you'd have an apt comparison. Or you can look at the Boeing 787's carbon fiber body design as an example of how to do something completely differently. They deviated from the norm but that involved years of engineering and testing to identify potential failure points, how operating conditions impact the service life, etc. They designed inspection schedules and procedures for out of spec events like excessive G-forces, hard landings, explosive decompression, over-pressurization due to pack failure, and so on. All of these things are well known with aluminum airplane bodies but not for carbon fiber. So a 787 operator knows if they have an explosive decompression event exactly what needs to be checked and how many flights to shave off the expected service life. From what we know right now Titan had a unique hull design yet did absolutely none of the engineering or testing legwork before putting paying passengers inside. That is what makes them reckless and Boeing or Tesla not so much.