I think you underestimate how poorly software development is done in traditional industries. Practice makes perfect and they mostly practice writing reports not software.

It depends. If you want to sleep well at night you take care. Of course if you are VW you take risks.

Taking a long time doesn't mean you've done more useful work.

But a longer testing can find more bugs.

So can a shorter one.

(In a box at 120°C for a day is roughly equal to a thousand days at room temperature).

Smarter not longer. Write in a memory-safe language and you don't need to pay people to maintain spreadsheets of memory allocations...

Agile does not mean less reliable. See Boeing versus SpaceX.

It isn’t that their engineers are inherently better at writing software. The parent comment explained exactly why their organizational and supply chain structure allows them to be more agile and better at writing software and delivering it.

I personally would rank Tesla's Supply Chain to high, so.