@spacerog @neil I would consider that a bad thing.
It's not that open source is bad.
Rather it's that people can get hurt due to software flaws (e.g. 737 Super Max & Tesla crashes). And without the legal obligation to build quality code people writing that code will, as I have seen time and time again, be sloppy or have not done adequate testing. (My business is building tools to test network protocol software for robust behavior in the face of non-laboratory conditions.)
In automobiles the person who is hurt is as likely as not to be a person other than the one who chose the open source firmware, so this is not a situation where the risk and harm is confined to the person who made the choice.
I've seen open source advocated also for voting systems. But in my experience quality in those kinds of systems, once again, comes from inspection and testing, not that the code is open to use and adaption by others. (I do agree that open code is usually easier to inspect and test.)