Sort of, they actually do rolling updates so that a new version of the code does not affect the whole user base at once. So again, reducing the cost of incorrect software. But it does happen, the VW emission scandal was effectively incorrect code. Noone predicted the 22 billion dollar defect, but due to re-use of components, it is possible.

Long Tail events is a big problem in software and a few lines of code are responsible for a large part of the costs (for a longer version of this answer https://possumlabs.com/the-cost-of-software-bugs-5-powerful-...).