Comment by JohnFen

This isn't a distro, but it is something at least equally complex. The company that I currently work for is a leader in our industry (I'm being intentionally vague here for legal reasons), producing very complex enterprise software for large customers. The entire company, not just the dev team, is less than 25 people.

The company has been doing this for roughly 30 years.

The size of a company is not irrelevant to what a company can do, of course, but it's also not determinative.