[sixdimensional]

This is not entirely true anymore. Many aerospace organizations attempted to move to less rigid/structured development process (e.g. wishing to become more agile) to attempt to "move fast and break things".

This trend actually has lead to an decrease in software quality and more quality escapes.

The larger aerospace manufacturers have mostly stuck with more structured process for safety/mission critical process, but around the edges (e.g. other systems running on aircraft), less structure and faster turnaround/more "testing in the field" is happening.

There was always the "skunk works" type of teams in aerospace organizations who worked with a lot less guardrails as well.

Source: worked for an avionics company previously.