I was reading the LKML(linux kernel mailing list) back when some.. people were pushing DBus (a message transport protocol) into the kernel (in a slightly differ

I was reading the LKML(linux kernel mailing list) back when some.. people were pushing DBus (a message transport protocol) into the kernel (in a slightly different form, as kdbus). Main reasons were performance (dbus sucks there) and.. i think security or something. Many comments in and the main reasoning for the performance improvement (of moving it into the kernel) was context switching (going from a userspace program into the kernel and/or back). At least two senior RedHat engineers, the top kernel maintainer, and a bunch of other engineers. Out of all of them NOBODY bothered to check out why dbus is slow. Until Linus himself ran a simple test and found that the user-space dbus daemon is not optimized at all. Context switches were something like 1% of the actual performance cost. Well.. saying that nobody bothered to check is just my wishful thinking, thinking that it is incompetence or just them just being jaded by fancy technology rather then malice (there's more to the story). Anyway. One of the mails was an infotainment engineer at some car company. Before that I, for some reason, thought that such a big and serious industry is very serious when it comes to software. But right then it clicked that car software makers are just as any other software writers (maybe a bit more serious). This was before two hackers hacked a Toyota. And later a Range Rover (or something) over bluetooth. Bout those companies are much older and much more serious then Tesla, and probably have plenty of world class coders at their disposal. As for the first part of what I wrote above (that i forgot by now). Teslas are not the first commercially viable electric car. They may be among the first to have nice range (over 300km). And Teslas are not the most affordable, that goes to the Nissan Leaf (2017 and above). Granted the Nissan is not a big car, closer to a Clio. On another though, they could just hire a security company to do a deep audit. Maybe they have. Maybe that's why they are incentivizing crackers. I do not and probably can not know. edited for readability EDIT: I'd maybe trust Rolls Royce. But i don't have money for that so it doesn't matter.